what about bras that appear to reduce breast sizes? a close friend of mine wears them and they do seem to work for her!
plus, every time you think you want smaller breasts, just think of those who want bigger ones.
You want to wear certain clothes and can't with large breasts, the other can't wear other types of clothes, which you can.
you get unwanted attention because of your boobs - others get it because they are so flat chested, men say they are ugly - what would you rather have?
I used to have huge issues because with my breasts until i accepted their size, try and do that before you risk your health with possibly dangerous pills from the internet or surgery (which is always risky).