US Immigration from Bulgaria

So we have a case number now and reading some places it is OK to schedule the medical exam after the ds-160 is done ( also done). Our case will be waiting till the next shipment from the nvc we got our case number on the 10th. I didn't know if it was OK for my fiancee to go to the medical now to get it out of the way or is Bulgaria one of the countries it has to have the interview scheduled first. she already has all the documents worked on an should have them all finalized next week. Thanks for your help guys

Sooo I check the timeline on here everyday when I start my day and we got my noa1 first week in February and I'm seeing a bunch of people all around us have gotten their noa2 already and even people two weeks after ours. Is this something I should be worried about?