Morphine paternal and future baby

Hello.

My husband is in Morphine and Vicodine . He takes time realise Morphine and Vicodine all ready 6 years. He has a very bed pain in his back ( disks problems).

Well we thinking about have a baby!!!!

My worry is ---------- is is baby will be healthy? I talk to doctors they tell me that what ever husband takes it will not case no birth defects.

I am scared the baby will be unhealthy or with birth defects I did have a Miscarriage when I was 12 weeks pregnant...Doctors do not know what is the problem was, but doctor did tell me that the medication that my husband take did not have any effect on it and that if I will have 3 miscarriges then they will start worry.

Thanks so much