When docs cant or wont find the reason sometimes they are lazy, and sometimes your shit just doesn’t work anymore, I think the word they use is idiopathic.
Androgel will make you feel better for a cpl weeks, then back down, they up your dose, you feel better and then down again due to the E2 following more T.
I’d just push for shots, when I made the switch between gel and inject it was night and day, it even made me give up adderall which I never thought I’d be able to do.
It may be useful for you to print this and bring it with you to review with your doc.
http://tnation.T-Nation.com/free_online_forum/sports_training_performance_bodybuilding_trt/trt_protocol_for_injections
I have seen a lot of posts saying that it helped get their doc on board.
Emphasize to the Doc that this is to feel well, not for body building, tell him you don’t even life weights.
Good Luck.