I have been getting a burning sensation/Pain in my left breast. It is deep down almost feels like it could be pain in my breast bone? It's more towards the under boob part. I only feel the pain when I am laying on my left side, and the longer I lay on my side the more intense the pain will get. I had a baby about 2 weeks ago.. And I got mastitis while trying to breastfeed but have been healed from that for about 2 weeks. Have been having this pain for almost a week every day. Not sure whats going on but it's starting to worry me!!