Ok, Dani, you asked fot it :-). You were worrying about how not to lose more bust. Ok, this is what I found out.
Increase your breast size
Doing push ups is the best strengthening workout for chest muscles. In order to target the correct muscles, you just have to make sure that your hands are aligned to your breasts and not to your shoulders. If you cannot perform push ups with your toes on the floor, you can always use your knees. However, once you have built strength, it is advisable to try doing the exercises on your toes for maximum benefits. At first, you can try to do two to three sets of about 10 repetitions.
Aside from the chest muscles, you also need to build your back muscles so that you have a better posture. Although strong back muscles do not contribute to augmenting your breasts, they help in giving you a straighter posture, which will help make your boobs look a little bigger. Back extension exercise is the best way to firm and tone your upper and lower back muscles.
I hope you enjoy it. I need to get mine smaller.