I am betting that the nurse meant to make that "slip"...even though nurses are supposed to think only of their patients, many of them tend to have a chip on their shoulders when they encounter a drug addict.
I am betting that your daughter in law was addicted to
OxyContin...when she found out she was pregnant she went on
methadone. That is why they are mentioning both drugs.
If she'd just stopped taking the Oxycontin cold turkey, she most likely would have misscarried the child. She should be proud that she had the courage to get help when she did....too many people are too embarassed or ashamed and don't get help and either end up miscarrying or continuing to use.
What you need to do is just love that baby. Thats all. Love their parents for giving you a granddaughter that will be healthy and happy.
Your daughter in law has shown how much she loves this baby by having the strength and courage to get help. If you thank her for giving you a miracle and tell her that you love her and want to help, I am willing to bet she will open up and tell you what happened and how.
PS- if the baby is in NICU they've got it covered. She'll be weaned off methadone slowly and she will never remember this happened...you'll forget it too....but her mother will live with guilt. Try to remind her that many women get pregnant under less than perfect circumstances every single day--we wouldn't think any less of a woman who gets pregnant who has diabetes, for instance, even though it's life risking for her and the baby. Many women have to take pain medication when they are pregnant, as well, and we would be understanding of that. Remind her that she kept that baby safe and happy for 9 months in her womb, and that she will do the same for her now that she is out. This two weeks of discomfort,that she will never remember, is but a minor blip in the the lifetime of comfort she will receive from her parents and you.