Spotting After ovulation

Selina

I need your help ladies, last week I ovulated and me and my so had sex as usual. On Monday we had sex again but this time right after we finish my stomach start cramping. So later on that night I went to the bathroom to pee and when I wiped I was spotting light pink. I was thinking maybe it was from the sex so I put a panty liner on and went to bed. The next day got up to get ready for work, went to bathroom to pee and I was spotting once more and again it was light pink. So it's been happening all week but since yesterday it only happens when I wiped. Today ive been having a little cramping but not to bad. What could this be, Have anyone had this happen to them.