Wtf 😥im concernedddd ! Unusual?!?

I started spotting yesterday brown for no reason i also ovulated yesterday as well couldnt even have sex 😒 is it normal? Only been having unprotected sex with my ex (we recently broke up) it started off like this and continued.. i feel like I might as well just put on my calendar that i started my period today .. i feel like its goin to get heavier 🙄 i got a little pain on my lower abdomen someone please help last time i was tested was late july and came back clean & my ex is clean too