It seems my chest will never heal? It hurts so much, recently, when I …

It seems my chest will never heal? It hurts so much, recently, when I held my daughter to my chest from strong pain I contracted, tensed and the pain went to the diaphragm and a muscle spasm occurred, I had trouble breathing, I thought I would die? How did you treat it? She is sucking properly. I apply Purlan cream. If I express milk, will she refuse it later from the breast? I don't want to go through the same ordeal again. Have to learn all over again.