Can you get pregnant while on the pill ?!?

Hey y'all so I need some help ...I missed a white pill before my red pills (sugar pills) but once I remember it was already the next day and me being the smarty pants I am I decided I wasn't going to take it Bc my red week was starting and I wasn't going to do anything (welp I was wrong ) my period started on Sunday and ended on Wednesday..... so then on Saturday I had unprotected sex and he finished in me (yes Ik a very bad decision ) however it's almost two weeks later and I have really bad heart burn and my boobs and nipples are super sensitive.I don't know if this is a pregnancy symptom or If I'm just going crazy because it would be to early to get any symptoms right ?