<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing burning chest pain, regurgitation, problems with the shape and size of my breast, and Im also having some smoking-related problems. What could be wrong with me?  <response>: It seems that you might be suffering from Mastectomy, which is the surgical removal of one or both breasts, usually as a treatment for breast cancer. 