Cramps after ?

I'm a 20 year old female. I had with my boyfriend last night & immediately after wards I got horrible cramps. They felt like period cramps but worse than I usually get when I'm on my period. It happened about a week ago too, not as bad though. The cramps lasted about 15 minutes. My period isn't due till around the 24th of this month. Problems with the female parts run in my family. My grandma had cysts removed from her ovaries. My mother had a hysterectomy when she was in her early 40's & my older sister had something removed down there when she was about 25 due to Endometriosis. I don't know if I'm having those problems already or maybe I'm pregnant?