Methadone???

We have found out the our emom has tested positive for opiates and benzos. It has been at random times. She will have a positive screen and then several negative ones. She is now in the third trimester. She has been prescribed Klonopin 1mg. and Celexa 20 mg. She is bi-bolar and having severe panic attacks. Any thoughts? I am kind of freaking out.