
I'll hope with you that they were somehow wrong, but I am so sorry you're going through this. It's not fair for anyone to lose their baby.
I know it's easier said than done, but try not to listen to your mom if she does go that route. I think you are an amazingly strong person for overcoming your addiction problem. I've had several family members struggle with addiction and have seen how difficult it is for them.
Also, my parents said some things to me after my loss that were well-meaning but insinuated it was my fault (like we didn't wait a full cycle after I stopped taking the pill). It was so hurtful! I was a bit rude and told them to just stop talking about that because if I wanted to hear if something caused the loss, I only wanted to listen to my doctor.
Regargless of the toll the addiction took on your body, you were able to get pregnant. You've been clean for over a year. The vast majority of miscarriages are due to genetic abnormalities with the baby that were so severe nothing could have saved the baby. You didn't do this. There are women who struggle with addiction throughout their pregnancies and give birth to live babies. That, to me, is evidence that it is due more to the baby's genetics. The baby takes what it needs no matter what the mother is ingesting.
We're here for you, honey. This is not your fault. I can tell from your post that you love this baby with all your heart. You do not deserve this. We're here for you.