Bra sizes and weight?

Ive recently been fitted for bras and im not particularly happy because ive gone up two cup sizes from a D to an E. None of the bras I liked came in Es, and now im stuck with big, ugly, chunky ones that i hate and really dont want to wear. Im 21 and im not overweight, but i have put on a few kgs in the last 12months at uni. If i lose these again, which im trying to do anyway, will that help me go down a bra size? I dont mind being a DD but I just hate being an E.