MW said I'll have to wait three cycles whenever by body finally gets back on a regular rhythm.
When I had my miscarriage (13 weeks) I was told I could start trying right away if I felt like I could handle it mentally.
My cycles went right back to normal, if you count the first day of the actual miscarriage as the first day of a period.
My son was conceived 2 months later.
The bad part is I almost lost him too (placental abruption at 17 weeks from a car accident, NOTHING to do with the miscarriage) and ended up on bedrest with severe depression due to it.