Sex 6 days past ovulation

Breana

So my husband and I had sex 5 days in a row bc I was supposed to ovulate around then. I used strips to confirm ovulation. That was last week between Friday-Tuesday. So I’m not even a week past ovulation. My period is supposed to be here Wednesday (so in 4 days). This morning we had sex and when I was on top everything was normal, but when we went to do it doggy style, my lower stomach felt very “off” and uncomfortable. I’ve been having cramps and nausea. My hips and nipples are sore as well. This is our 4th or 5th month ttc. Any ideas as to why sex was like that? I have never experienced that before and we’ve had sex on my period before (please don’t judge). Ty in advanced.