cramping after sex

I only recently lost my virginity however I've had sex about 4 or 5 times now. stupidly it was unprotected the first time but I took the EC pill after and got my period as normal. after the past two times of sex, however, I've noticed that I get pain in my pelvis area, I'm currently ovulating and get bad period cramps during my cycle anyway. Could this pain be just from the sex, from Ovulation cramps or worse? I get stressy about pregnancy!!