helpp🙁

I had sex on November 25 and 26 pull out was used and I got my period on the 30th. But I had REALLY bad cramps. First I was doing the dishes and I felt spaced out and my vision started blacking out so I went to lay down. Then the cramps came FULL TROTTLE like I've never felt before.. I was sweating and crying and it's never been that bad before, and then my next period started and I didn't get any cramps at all at first and I was so happy but a few hours later I was in the same kind of pain. I was taking a nap and it woke me up😳😭 I also have been having a weird pressure on my tummy since the last time I had sex.. and my periods were also lighter then normal. Both of them. And my first one was really late. The last time I had sex before that was august and I had normal periods before. Idk what could be wrong😥