Really confused

Me

Soo I know I ovulated 8 days ago bc I normally get ovulation pains , never fails , every month. Hubby and I had sex 2 days before that day so obviously there’s a chance I’m pregnant.

I am on CD 24 today and my cycles are usually 30-33 days. Never less.

Starting yesterday I was extremely moody and not sure what I wanted. Lower back pains and cramps , went to the bathroom and saw I was spotting. Ok no biggie , this morning went to pee and there was slightly more with a red streak. Now I am still spotting brown but no more red.

Took a test this morning and obviously was negative seeing as I’m only 8dpo. I cannot imagine I am already getting my period on CD 24 ?!? Is this possible ? Could it be implantation bleeding ??

Help !!