Has anyone here had sex on their ovulation day, unprotected and DIDNT end up pregnant?

My period in July lasted from the 24th to the 28th. I ovulated on the i was I believe 6th of August and had unprotected sex that night. I’ve had irregular periods since I had my son in October. So I know my ovulation days could possibly be a little off. I’ve jad a kind of watery white looking discharge it’s not thick or creamy . I also wiped about two days ago and I had a streak of blood, I dontknow if it was implantation bleeding or if my vagina was just irritated

I’ve been having diarrhea and some on and off cramping also some back pains so I can tell if it’s period or pregnancy symptoms