Suffer From Moderate To Severe ED. Taking Sertraline And Diazepam. Have Low Testosterone Levels. Suggestions?

I am a 57 year old male with moderate to severe ED. Due to my anxiety and depression disorders I am taking 150mg sertraline once daily and 5mg diazepam three times daily. I am professionally treated by a psychiatrist and follow his advice without exception. I am fully aware of the sexual side-effects of taking SSRI's. Also, due to low testosterone levels (below 250) I was referred to a Urologist who is aware of my problem and balancing the dosages while checking PSA and blood chemicals. However, no matter how hard I try I still cannot get any of my physicians to at least attempt to address my ED problem with a degree of interest that leaves me the confidence to believe things will get better. My psychiatrist and I discussed a more aggressive herbal, natural regimen found in a supplement called PHGH. He concurred that I should try it since I've already tried vacuum pumps, trimix, viagra, etc. without any improvement. If this works, then all is well. If not, what physician in the Birmingham, Alabama area specializes in ED treatments?