Pregnant or period?

Nina
So I'm 10 dpo today and I took a test, it was negative. Last night my husband and I were having intercourse and I started having pain. I thought it was just from him hitting my cervix in that particular position. But after we stopped it was still painful and I couldn't stand up straight. It lasted a couple of hours and I used a heating pad. Anyone ever have this happen? I've never had it happen before and it freaked me out. It's still a little sore, like my uterus feels heavy. I've been having normal bowel movements. I was hoping it somehow meant I was pregnant but it's probably wishful thinking...