Soreness???

I had sex on my top fertile day, and now, today, (4-5 days later) I’m having some pretty obvious uterine pain that almost feels like it’s sore? I’m not sure how else to describe it. It twinges when I cough or sit and I can feel it if I press on my lower belly. It’s also been accompanied by a good bit of gas and constipation. Any ideas or advice?? I haven’t had any bleeding and I’m still 9 days away from missing my period