The change you see when bending forward is usually related to the way the implant pocket, breast tissue, skin envelope, and pectoralis muscle move against each other. In the photos, there appears to be some implant-breast tissue mismatch and dynamic distortion when you lean forward, but an exam is needed to tell whether this is mainly animation deformity, bottoming out, a waterfall-type deformity, or capsule/pocket malposition. The fix depends on the cause. Options may include implant pocket revision, changing the implant plane, capsulorrhaphy or internal support, implant exchange, fat grafting, and/or a revision lift to better align the nipple, breast tissue, and implant. This is very understandable to feel self-conscious about, but it is a common revision question and best assessed by a board-certified plastic surgeon who can examine you upright and bending forward.