I have low testosterone which I checked 3 months before .I feel erectile dysfunction when I masterbate with my penis .when I have sex with my wife it erect but after stoping foreplay it down automatically with out ejaculations after that it erect hardly ...feel low libido ..stress ... anxiety ... I also test testicle biopsy ..it seems normal mature sperm and sperm cells are also present Urine report is normal Hiv reports is negative What should I do ??