Cramps during sex on IUD

Kali

I had sex about three weeks ago and at one point I started getting menstrual feelings cramps and I was thinking maybe he hit my cervix and I told him to stop because it didn't feel good. And than again the other day my toy did the same thing to me but I don't think it was in far at all. I'm not sure if it has to do with my IUD or not and my OB can't get me in for a long time