Hi I have been having dull pain below my upper rib cage on my left side which radiates to my back and I also have flutters in my stomach and in that area but I m not pregnant. I have also lost 6 pounds in 4 months without trying to lose weight. My face also gets really hot and flushed. Do you know what this could be? I had a X-ray done of my chest, the doctor said my lungs looks okay because I was having back pain also. I also had a complete blood count and doctor said my blood count was good everything came back normal but this discomfort on my upper left side will not go away.