Cramping bad 7days before Af

Sooooo! I was ovulating last week & we manged to get busy a few times. Today out the blue my stomach started cramping. I NEVER CRAMP before my period and even when I do it's lite. it's usually lower back pains and sore breast. Well I hope I don't have the prego fever because I noticed the other day my boobs were slightly full, but I blamed Af for it. They were sore as usually but just fuller. Ladies what's your opinion help. Period expected on the 5th