I have been experiencing back pain on the left hand side of my back (not lower). I have had kidney stones before and I thought that I might be getting another one but it doesn't feel the same, although the pain is intense. I am also having diaharrea after I eat and the pain seems to worsen after I eat. I use a heating pad and it seems to help a little but it is progressively getting worse. My urine is clean (no blood or funny color) and no burning when I pee. I have drank about 2 bottles of cranberry juice and that has not worked. No fever. Any suggestions would be greatly appreciated. Thank you!