Im 17 nd had sex wit my buddy for dha 1st time on 4/20 ,and it was unprotected...2days pass and I had to pee alot nd it was painfully..went to the school nurse 2 ask wats wrong she took a peepeee sample and told me I had a UTI...got dha medication for it though on the same day ..and then on 4/24 my period came and i was having painfully cramps tho it usually happens wen I'm going 2 start it Also nausea..but it stops usually on the 2 day I'm on it and I'm still on it,Can I be preggo or ami jst paranoid.??