First off congrats on the weight loss! 20 lbs is quite an accomplishment. A couple years ago I lost 35 lbs and went from a full D to a small C. Since then I have gained about 10 of it back (Finally at a stable weight) and have settled into a C. While I was kinda sad that my breasts got smaller, big breasts like that look disproportionate on a tiny body. I think that the initial shock of losing all that fat might seem kind of odd but once everything evens out you will be pleased. I'm so happy for you! Keep up the good work!