No period or ovulation still since my mc, what's going on?!

👣

Completely negative pregnancy test for the last weeks now and still having no positive ovulation tests or any signs that a period is coming. It's been a little over 3 weeks since my d&c, which I know a lot of women don't have a period for 5 weeks or more but they usually also have a positive pregnancy test to go along with it. I know if you have hcg still you won't have one but I don't have any hcg now and still no ov or period. Does anyone know why this is?