I am having pain in my abdomen, some back pain, light headedness, listlessness, loss of appetite, nausea. This has been going on for several days. I went to the doctor. I had some tests done and there was blood in my urine, protein and some other things that made them suspect kidney stones. However they tested for them and there were none. I still feel bad. I hurt all the time. I'm on antibiotics for the infection in my bladder - have been for 3 days now and do not feel any better. What else could be wrong?

Optional Information:
Female

Already Tried:
antibiotics, pain medications, antinausea medication