Whats going on with me?

I had a miscarriage on the 2nd. i had unprotected sex on the16,21,24, and the 26. I have been trying to get pregnant again and I've been getting nausea after sex,i've been extremely horny, I've been having pains like where my ovaries are on both sides.My menstrual is irregular so I don't know if I've already ovulated or if that has anything to do with it.Someone please help...