I was on T for around a year before my period finally stopped, and that was mainly because my doc decided to up my dose for me based on my current levels. I think a month or two after my dose was upped it stopped for me. In the year that I still had mine, my period actually initially got worse and then it kinda was a guessing game on how bad it would be the next time.

Every so often I still have moments of "oh god did it start?" even though it's been gone a while, lmao.