Hello, I have been having discomfort under my left breast. It started about three weeks ago. I felt like I was having a cramp and then it would go away. Now it is daily,shortness of breath, pain under breast and it feels like it goes thru to my back. I have been feeling lightheaded also. The fatigue is awful, all the symptoms seem to get worse as the day progressives. Also I have waking with a headache every morning for a week.