I started taking my birth control pill right before my period. So I missed my period that month. I had sex on the 3rd week of my birth control pill(28-day) and it was unprotected but I took a morning after pill to be safe. Now I am on the pills without the hormones but no periods yet is this a sign of pregnancy?

Yes it is possible but the moning after pill should have taken care of it. Your period might have stopped because the pill you took isn't the right one for you . Ask your General Practitioner
They are there to help you privatly you can ask them all of these questions and any others about your body.
Overall I think you gp is the best person to ask.
Hope this helps :0]8
Your truly Annalyse