Oh mighty wall of text, I bow down before you
Glad to hear you got it covered by insurance, its hard to do usually.
This following is all IMO, so take it with a grain of yummie hypertension inducing salt.
As for about if it will come back, it really shouldn't at all, but technically if he at least leaves enough material to leave structure, its possible.
As for hormone regulation...I would say take nothing. Clean up your diet, maybe a good test booster, prover vitamins and nutrition. During a healing process, other than nutrients I would usually avoid anything else.
Again all IMO guy who never sleeps(me) over and out