Bleeding during ovulation?

sarah
I had a MC at 8 weeks in jan, got my first period about 12 days ago. I'm in my first green window which I'm happy about, I checked my cervix and took an ovulation test. But I'm spotting. I never bleed outside my period and never have done. My cm is saying ovulation but the ovulation test is negative, not even high!! What's going on? :(