After breast augmentation surgery, many women hear and feel sensations which can be different on one side compared to the other. Usually this is from a small amount of air or fluid around the implant. It is common to have sloshing sounds, and bubbling sounds. As the months go by after surgery, these should diminish and eventually stop as the body absorbs the air and fluid. Often times the larger breast has more room and a smaller implant is placed leaving everything feeling softer than the smaller (tighter) breast with a larger implant. This can explain some of the difference between the feel of the implants from one side to another. It would be unlikely to have a rupture this early after surgery.