Hmm... I know this is going to sound hokey, I had the SAME exact symptoms that I kept expressing to doctors felt like kidney pain (as I had experienced SO MANY kidney infections, I was all too familiar with the pain) test after test after test, like you and nothing. I went to a doctor of Traditional Chinese Medicine, said NOT a single word as why I went to see him and he told me right off the bat after taking my pulse & looking at my tongue, "You have pain in right kidney." Right on! Just a mere suggestion. Hope you are feeling better!