You may not need an AI at that dose. I'd look into a
reasonable dosing schedule first and see how things go. Reducing spikes in your testosterone (infrequent injections do this) will reduce the amount of estrogen (causes bloating) your body produces. I would definitely see what that estradiol came back at though.
As TapThat mentioned, 100mg/wk is pretty conservative; it might also be time to look into bumping up that dose if you don't
feel good yet. Then again, if your doctor is uncooperative - there is nothing stating you cannot move on and find another doctor that may be better versed in male hormone replacement therapy.
My .02c