Unprotected sex while ovulating

Soo I had a party and a little to drink and I’m very comfortable with my sexuality so I embarked on an impulsive threesome with my two friends, a guy and a girl- unprotected.

eve said I was 2 days away from ending my ovulation period but when the moment arose, it arose.

The last time I got off my period I was having back pain for a couple weeks on and off like I wAs on my period.. headaches, sore throat occasionally, and a very barky/ mucus cough.

His dick was big and it was pushing against my cervix and when I was on top it was starting to hurt but the pleasure outweighed the pain so I endured. The next day I was bleeding a teeny bit (like normal) and that same evening it appeared like my period had started. I put a tampon in two night later because one was needed.

I’m not supposed to start my period for another 12 days... I’m v confused and kind of worried