From the neck down in that outfit, I gendered you female before even thinking about what I was looking at, lol. I don't see any evidence of "body-building". Your arms look feminine and proportionate to your shoulders and so on. Granted the outfit is a bit baggy so that's about all I can offer.
On second glance, there's a bit of added definition in your shoulders I can see, but there's nothing wrong with that, some women are pretty buff. Not body-builders with crazy muscles buff, just athletic and strong, and it looks sexy as hell when done "right".
A different shirt would probably do wonders, and a bra

You look like a girl going to play basketball imo.

Do some squats and build up that booty! And keep going with the hormones. Some people respond quickly, but they're usually very young people. Others (adults) can take 2-3 years before 90% of the changes have taken place sometimes...
P.s. I love your pillowcases!