Well, relatively low-E birth control pills can and frequently do cause breast enlargement. So yeah, high T causing higher E can be a big problem and not just for this reason. It would be worthwhile to get your levels checked again soon (also ideally including an E level) and then depending on what those reveal, discuss maybe lowering the T a bit. Less really can be more, where more can easily be less.
My doc initially didn't care that my total testosterone (TT) was going way into 1,200-1,400. Until he did all of a sudden, and probably when he thought about T converting to E (there was no other reason outside of that by the labs alone to do it but I'm glad we did). Now we've been keeping it at a steady 800 for the last nearly 13 months now and it's alright there. But I might actually try getting it down to 700 or even 600 just to see if things happen faster there because I suspect I'm still getting a little too much E at 800 [those are lab values, not dosages BTW].
The goal really is to get a balance here. The point where you can get the most T but which doesn't increase E too much. If that is happening, it is just going to cause changes to be slower because the T and E will be fighting each other and therefore also confusing your body as to what it's supposed to be doing with one or the other. And yeah, it could be the point of reversing some of the temporary changes T manages because those things are also otherwise dependent on E.
