Cramps

I have a very typical 28 day cycle, occasionally 27-29 days. I had unprotected sex on day 6 of my cycle, still light bleeding from menstruation. On day 8 I started having mild cramps. Definitely not painful or even uncomfortable really, just kinda there. Fast forward 10 ten days and I'm still having these cramps off and on. If I'm busy I don't even notice them honestly. With my previous pregnancies (7 of them), I've experienced cramps, but never that soon after intercourse. Usually a few days before my missed period. Could this be something else? Or is this screaming you're pregnant?!?