As everyone else has said...You need to go have your E2 checked - (Estradiol, Sensitive)
I just got my bloodwork back from privateMDlabs & mine came in at:
Estradiol, Sensitive 21.2
Recommended ranges are as follows:
Estradiol, Sensitive
LOW: 8.0 pg/mL - HIGH: 35.0 pg/mL
If your TRT doc won't test your E2 like mine won't you can order the test from privatemdlabs.com
No one sees your results but you & they will keep a record of your results online if you create an account, then you can refer to your test results down the road.
I had the same problem happen to me after about 6 months on TRT.
I'm NOT saying that this could be the only thing contributing to the problem, but the most likely. Also possible contributor would be prolactin as Mega says.
Hope this helps!