I had bunionoctomy surgery on my right foot on Mar 28th, 2014. I left using crutches which were sore on the armpits and two days later my right breast on the very side has been very sore. When i jump I can feel it and it hurts to the touch. After many examinations by myself, I found a small lump on the side of my breast and it feels like a cyst would feel, which is painful. I have a doctors appointment this wed. I am worried that it could be cancer. What do you think? Thanks, April