Conceiving post miscarriage help

D&C on dec 28 at 6 weeks along

Period back on Jan 22

My period came back early at only 25 days after D&C

I still haven’t ovulated and I am on cycle day 15th

Before this my periods were all regular at 28 days.

Why am I not ovulating yet? Was that not really my period? Do you ovulate later after first period after miscarriage?

Any help appreciated thanks