Help put my mind at ease

I've only had sex with a condom. It might have slipped off before but I'm on birth control (take it everyday at the same time) I was raped around a month ago by my "friend's" boyfriend (he wore a condom but it could have slipped off) and I have a boyfriend and we've only had sex with a condom on. A bled for a few days last week (all days were light except got one heavy day) and now I feel a little dizzy. Am I over reacting? I'm just too young to get pregnant and I'm scared