Is there something I can take to lose weight after meth addiction?

I have been sober for over 15 years however I have gained 100 lbs. I am over 50 years old and I was pregnant 3 times, quit smoking and have a stressed life with Autistic child and abusive mother. I may be bipolar from all the stress in life and being a reformed drug addict. Is there something I can or should be taking to control my weight gain and depression together? Thanks for all your honest and knowledgable answers.