I Am Wondering If I Should Go To Rehab. My

I am wondering if I should go to rehab. My pain management doctor (I have had 2 back surgeries) will only give me Methadone. I hate it and I want to get off of it, but I am scared of withdrawals. My psychologist is weaning me off of Klonopin, but I am scared because I have been on it for years. I also want to get off of Seroquel but I worry about withdrawals from it too. She wants to give me Risperdal injections since I am schizophrenic with bipolar I. I know I need the psych meds but I am scared to stop taking Methadone cold-turkey. Help!