I came to the US on a K1 visa and have a EAD that will expire on the 16th of may
I filed my I-864 along with I-765 on Friday the 9th of may
how long will it be until i will be authorized to work again??
or what is the average time to wait after mailing AOS with the I-765 to be able to work again?

I hope you also filed the I-485.

yep I sent the I-485 thanks for your concern i ended up double guessing myself

You could do a search on the feature above entitled 'immigration timelines' to see what the numbers are for the VJers on this list. The official statement is to allow 90 days to receive your EAD. Some receive them earlier and some receive them later, but it is a good yardstick to use for your plans and preparations. You have a few months holidays coming up from the sounds of things.

Very often the EAD is approved within 90 days, usually between 2.5 - 3 months I would say.