mine are the same even 2 years post op they didnt tan no matter how much i went on the sunbeds lol mainly my sideboob., and faketan goes on so bad!! :/ so i cant help with that as im the same!!
with the peeling try palmers Tummy Butter its really nice n thick n stays on n moisturises them really well i put it on then put my sportsbra over it and go to sleep it really helped
and i think its normal for them to be sore around that time of the month. aslong as its not happening other times and its ONLY during that week then it sounds normal as our nips n everything can be more sensitive after a BA which would explain why it didnt happen before ur op xx