When I first started taking estrogen four years ago, it took about four or five months for them to begin to work their magic. It's like one night I went to bed and everything was normal, when I awoke, I had this weird pain in my nipples. Thus began the breast growth and it wasn't long till I had to start wearing a bra. Now mind you, they never did get that big, but they are big enough to warrant wearing a bra and when I don't wear one, they do flop around a bit. Anyways, the first few weeks of wearing a bra were perhaps the most uncomfortable of my life. I just couldn't get used to this new sensation underneath my shirt and I just felt like everyone was noticing how miserable I was. Then one day it just became normal and it's only when I don't have a bra on that I actually notice it.
I guess the point of all this is that there were a lot of things that I totally wasn't prepared for. This was one of them.