The tightening will ease off in time honey,its early days for you,also your breast will go through changes over the next few weeks,so try not to be too down,I have seen previous posts about people having breathing problems,they seemed to be fine,but I would ring the nurse just to give you peace of mind it could be part of the healing process,she wont mind honey give her a call.You seem to feel better if you discuss it with the nurse.xxxx