I had a unilateral mastectomy with a keyhole incision when I was younger, so I only developed one breast. I am 7 months post op from bilateral under the muscle breast augmentation. I anticipated them to feel different, but I'm not sure if what I'm experiencing is expected or if I have complications. The reconstructed side is much firmer, sits higher than the other and it doesn't move around as easily. I don't feel pain, but occasional tightness.