How To Treat Uneven Breasts?

hi im 16 i went to the doctors when i was 14 and they told me to come back as there was nothing they could do, my left boob is a DD to an E and my right boob is an C... i hate to talk about it and cover it up as much as i can ive wanted to kill myself before i am very contious and it upsets me very much is there anything i can possibly do ?i am going on holiday with my boyfriend and hes family in 3 weeks and really would like it if they didnt notice! :) ?