What should I know about low testosterone levels?

I hav always suspected I have a pituaitary disorders since my endocrine levels are all over the place. Low cortisol, low Dopamine, high renin etc. I have had adrenal testa and kidney scans and all were ruyled out. I also have depression and high blood pressure, sleep apnea and diabetes. My family foctor always blew off the pituitary theory and keps stuffing anti depressants in me. I recently had a vasectomy and testosterone levels prior to the surgey were low and my doctor ordered tests for pituitary and testical dysfunction. Honestly I am hoping fo a benign tumor in pit gland because this would explain alot. I I on the right path or just getting my hopes up?