Bleeding post mc

Shelbie • TTC first for 6 years and miscarried at 7 1/2 weeks with twins. 3 months progesterone only. 5 timed intercourse cycles, 3 IUI cycles, 9 timed intercourse with trigger shot. All fails! Have till September to conceive on our own then we are onto IVF
Had a miscarriage 3 months ago, got my period naturally 47 days out from the mc. Ever since they I bleed for 7 don't for 7, been going on for 8 weeks or so. Any ideas or had this happen? Ps. I have gotten a positive opk 2 days before the bleeding, as I have had ovulation cramps each time. TIA