You are on TRT now... unless you have plans to ever come off it, you need not be concerned with shutdown. You just need the numbers in the right range. At this point forward, it doesn't matter if the testosterone is coming from your testicles or the syringe. The R in TRT is for Replacement, which is what it is intended to do. After 10 months on TRT, I'd venture to say your testicles are done producing any testosterone at all. If you can, see if you can get the doc to let you do weekly shots instead of every two weeks. You'll feel more "even".