I agree w/mommyin 10, when I'm on progesterone, my period takes about 2 1/2 days to come after the last supp. BUT you should maybe get blood work to be certain.
Good luck
Well, it's definitely possible that you could be pregnant & there's just not enough hcg to register on an hpt yet... The other possibility is that, yes, progesterone can delay your period. It happened to me every time. Usually, it shows a few days after you stop the progesterone. I hope for the best for you :) Just give it a few more days & test again or call your doc & see what they say. Best wishes!