KLB

After hastily looking to double check it says on the Consulate website the "Evidence of Support (Affidavit of Support)" must be "less than one (1) year old when presented at the visa interview"

If you go over on the VWP and get married and your K1 is not approved you will invalidate your K1 petition and have to start over and petition for a CR1 ... its probably better to postpone the wedding until you have your K1

Exactly my point. Not everyone is ultra-prepared and a know-it-all. That's why there are forums - so people can ask questions and get answers!

I mean you, the worrier who is honest to a fault, will think of some reason why you have to spill your guts and discuss it with the Knightsbridge doctor. I also know we have discussed that you have managed to hold down a demanding job as defense of previous depression and harm episodes if you needed a defense. Would these medical referrals and time off work change that? Oh cr@p, now I've given you something else to peserverate over.
I'm just saying you are fragile and worry, so thinking about all the possibilities 24/7 until August when you might get petition approval is going to do you in mentally. Might means...it could go longer like September. The closer people get, the edgier they are. Our petition took just 50 days and I'm so laid back I barely have a pulse. But I could tell I was getting edgy so quit checking status online. Who needs to be disappointed 3 times a day? Who needs to worry about who got approved ahead of you. Who needs to worry about every problem somebody else had in the Philippeans that might happen. It is all rubbish and I quit holding my breath and let immigration happen as it unfolded. Just breathe.

Whether you have a job or not isn't really part of the visa process. You could say you are unemployed or I quit my job in March. Getting referral to a medical professional brings up more to talk at the medical exam. I think you are stressing, not only about your mom, but also this whole visa process. You worry about every detail so much your head is probably about to explode and you aren't even close to the London part yet. Don't you have a mate you could live with temporarily or rent a room somewhere? Remove the things that are stressing you. Quit the job if you can't keep up. Relax about the visa, the varicella, the maybe heart condition, the interview, the adjustment of status. You can't let the visa process consume you and I can tell it is. Stop thinking about it until you get notification by email that the petition has been approved. Don't check your online status, and get off VJ completely. Just carry on with your British life and don't think about immigrating or read about visas for six months or so. Dont hang on the computer with your fiance when he or you needs to be sleeping. I know the struggles of time zone differences. I would guess that you arent getting proper rest trying to be with your fiance virtually. That's the best advice I can offer.

Thank you ... I will look forward with eager anticipation for todays list
This is a fab thread I'm amazed that this info is out there!!!

No need to apologize You didn't do anything wrong
I moved it here because, I wouldn't want other people's answers to confuse you. Not everyone knows that every embassy proceeds in different ways.

When NVC tells you the case number you can book the medical. Would it be a good idea to book it for the next few days? No. Do you want your medical file floating around the embassy before they have received your case and logged it into their system? I think it's best to stick as close to their business model as possible. Planning ahead is excellent so the ball doesn't remain in your court while you figure out what to do. But serving the ball before the lights are on at the court and before your opponent arrives is a little risky.
The order that I think works best.
London gets your case and logs it in.
Bam! You submit the 4 application forms the same day.
Your medical results arrive at the embassy
Your DS-2001/cover letter arrives at the embassy.
Meanwhile, have you seen this list to remind you of things to do now?
http://www.visajourney.com/forums/topic/350185-london-2012-k1s-from-noa2-to-interview-thread/

Rob get a folder or shoebox and put things in it to show your marriage as you start building your lives together, especially things that show you co-mingle your finances and live in the same house/apartment. Take photos together. Then if you have an AOS interview, you have a pile of stuff to take as evidence already gathered. If you don't have an interview, continue adding to the file additional bits and pieces that will show a two year relationship that you will mail in with your removing conditions application to get your 10year greencard.
Things to consider are--
Joint bank statements
Joint credit cards
Both names on a lease
Joint tax returns for 2012 and beyond
Both names on car insurance
Both names on some utility bills
Either as beneficiary of the other on work things like insurance, pension, 401k
Car registered In both names
Mail to Mr/Mrs at the same address
If you write checks to pay bills, consider each of you taking turns writing the check from that joint account. It shows you actually use the account and share using it. My bank includes photocopies of checks in the statement, but you may even need to use the carbons or photocopy the checks before you mail them. We don't write many checks, and it's always me but for two years I made sure my husband wrote out the checks occasionally to the lawn guy or to my aunt I help support. It looked good to see that we shared the bank account and the bill paying.
The list is just some examples for you. It doesnt have to be everything on it and you may think of others. Print out and throw in a photo together now and then. You don't have to save everything, but a smattering that covers two years from marriage until you remove conditions. Having that folder or shoebox will remind you when you get a new joint thing to save it. And it will keep you from throwing away that old auto insurance form from 2013 that will prove useful in 2015. They want to see two years together, not everything dated around the time you remove conditions.
Then sit back and enjoy your life. When you need evidence, you'll have a bunch already gathered to choose from and organize.
Edit to add: Best thing about citizenship is not having to consciously plan things that make us look joint and save all that stuff.