Getting off of birth control

Hi guys! So before I got on birth control my boobs were a full C/small D cup. I was also about 105lbs. I got on birth control and jumped to a full D cup. I got off about a year ago because I hated the unnecessary emotional roller coaster. Since then I've consistently lost weight to where I'm now 98lbs and a small B. I'm consistently eating but has this happened to anyone else after birth control? How do do you fix the hormonal imbalance that's causing this?! :(