Cheryl, I would ring my breast care nurse immediately in your situation or your breast surgeon. Onr week ago I came in to my hospital's wound clinic to get my transplanted/relocated nipple on the reduced breast looked at, and after examining me, the nurses immediately rang my plastic surgeon. He took one look at both breasts, examined the mastectomy one, and said that I had a major infection. I had thought that the warmth and swelling were just part of the healing.
He admitted me straight away, put me on powerful antibiotics which I am still on, and operated the next day on the infected breast, washing out the breast. Two days ago he concluded that the transplanted nipple on the other breast couldn't be saved, and I am currently fasting for an operation in thee hours to remove it. In two days comes another operation to place a skin graft over the hole where it was.
in other words, if the breast seems wrong, go immediately and get it looked it. Tonight will be my fifth operation since 12th February!