Suggest Treatment For Severe Anxiety

hi doctor, i m a 66-year old male who had a nervous breakdown four years ago that tramatized my brain and left me virtually nonfunctional outside the home ever since. I had to retire from my job and now stayat home 95 percent of the day. I have undergone psychotherapy which has helped me accept status in life which caused the breakdown. However, I still wake up with severe anxiety every day. I can barely type this out. I have been under psych doc care and been prescribed clonazepam to norco to methadone to alleviate the severe anxiety, pain & distress I feel in my brain & body every single day & night. I hardly sleep anymore. I am desperate for relief. The anxiety originates in my brain and produces pain that radiates throughout my body. My muscles are shrinking from atrophy and pain. Are there any stronger pain relievers or sedatives a doc could recommend in this age of opiate paranoia? Please help. thank you very much, Steve Olson, Fresno, CA