Sex pain

So the past four days I have pain in my lower stomic I'm guessing my uterus but it hurts when me and my husband are having inercorse like if he was stabbing me can that.  Be sign of ovulation or anything else ?? I been ttc for over a year and I've only been on one round of clomid I been off of it for three weeks and never ovulated I think and I skipped my period but I have PCOS and I took a Prego test and negative