I really mean it when I say that this site has been a life saver for me. I have learned a lot here. You may have several problems here contributing to your fatigue and other symptoms. This is quite often the case in HIV-related fatigue. Your testosterone level is low for a 37-year old man.
Treatment involves replacement therapy.
A preferred method of testosterone replacement is with transdermal patches that allow slow absorption of testosterone into your system, which is more what your body is used to. However, some insurance plans may not cover the new preparation yet. Now, on to your hemoglobin. It was 14.1 in Dec. and now has fallen to 12.8. Your recent switch to AZT may be the culprit.