Are you averse to using Vitamin V? A little of that and it doesn’t matter what is going on with the big head - the little head is ready to jackhammer concrete!
My transgender girlfriend and some of her friends have increased their breast size through the use of hormones - estrogen and a testosterone blocker. I like her flat and natural.
They have desks that go up and down so you can sit at them or you can raise them so you can stand up at them too. There are exercises that you can do too to keep your blood circulating.
https://www.webmd.com/fitness-exercise/features/exercise-at-your-desk