Confused

So sadly, I didn’t get my BFP last cycle and my period ended about 7 days ago. Yesterday and day before I had some symptoms I don’t ever have after my period until it’s due again. I had sore breasts and some lightning like cramping. Today I had some light bleeding, like it was barley there but I felt something come out into my shorts and i wiped and it was light pink blood.

My SO and I had sex 3 days ago for first time this cycle. I have never had this happen before and I am wondering if this could possibly be implantation? Could I have ovulated a few days after my period? I haven’t tested ovulation yet. And not supposed to ovulate according to glow, until next week.

Thoughts?? Anyone else ovulate super early and have this happen and become pregnant?