AF A Week And A Half Early

I woke up yesterday morning bleeding, I just had my period on November 16th 2024. I’ve been taking ovulation tests every other day or when I remember. The blood is bright red and has clots, I was thinking implantation, but from what I could find, implantation bleeding is like a light pinkish colour and doesn’t fill a pad. Mine is bright red, blood clots, and can fill an entire pad. I just don’t know as to why my period is like a week and a half early. If anyone has an experience with this that ended in pregnancy please let me know or if you have advice to give. Thank you in advance.