Blood levels will tell the story but after 5 years of pills, I only reached a AA size cup. I am currently between an A and B cup with around 30 years of HRT. I am tall at 6'2" so I had very little growth from hormones. Others taking the same medication and the same dose respond far better and faster than me.
The other issue is 6 months is still pretty early in the game and it could take 2-3 years to get an idea how you will respond.