low testosterone and on MMT

About 5 years ago I had a relapse in my long standing recovery from heroine addiction. During that recovery time I had no sexual problems or difficulties.  I startedon Methadone Maintenance Treatment 5 years ago and have had ZERO sex drive since no morning erections NOTHING. About  two years ago my wife fed up insisted I see someone my PCP did a testosterone level which was in the basement if I remember it was 95 normal he said was 300 - 800 in  his lab.  I was put ont he patch and I was switched to the gel.  In short I am decreasing my methadone currently I am on 75 mg and using the gel everyday. My testosterone is 325 and I still have ZERO sex drive I also take prozac 20 which I do not believe is an issue as I was on it for many years during my 16 years of recovery and had no sexual desire or preformance issues.  I am wondering if there could be something else wrong and where I should start to look. I have ZERO energy I am Depressed I have no strength I feel useless to  my wife and helpless to fix the situation.  Any advice would be greatly appreciated
thanks