Methadone and pregnancy?

Anabel • 2 healthy pregnancies, youngest child is 7. Had mirena for 5yrs. Been TTC for over 1.5 yrs got pregnant in Sept found out on 10.22.15 had 1st miscarriage bc his lil heart stopped.I was almost 10 wks
Has anyone had a pregnancy while on methadone? If so what was ur dosage, and experience after having baby? Or did the worst happen n experience mc?