Hello Mitty, sorry you have joined us on here.
I had a masectomy last week without immediate reconstruction as waiting for my results in case anything other than DCIS as inside. I also had SNB.
SNB has been sore rather than painful and this has caused most bruising but then I bruise very easy. I am 52 and it was found during my first routine mammogram.
I currently wear a post surgery padded bra and not noticeable under clothing, will have a reconstruction hopefully DIEP once able.
Read only good sites like this or macmillian or similar not Dr Google and you will help with your concerns and decision but talk to your cancer nurse and consultant.
Take each step at a time and all the best with your surgery etc xx