I took an ovulation tests to see if I was

Patient: I took an ovulation tests to see if I was ovulating and it showed a peak on the 9th and then the next two days it showed its highest peak. Then on the 13th I started bleeding very heavily like a period and have continuous cramps. I don’t get my period till the very last week of every month and it has been like that for a long time. So i don’t think it could be my period because it’s about 11-12 days early. I’ve heard it could be implantation bleeding but is it suppose to be heavy like this??

Symptoms: Cramping

Doctor: