pregnant?!

i had unprotected sex this past june.. i took and after pill right at the spot and i was on the pill too btw. my period came in the same day i had sex and then it was about 2 weeks late in july and then in august a couple days late and ended in september. i was supposed to get my period around the 28th but still nothing. i feel bloated, pain and preassure. idk whats wrong.