Abdominal /flank pain on left?

For almost a year, I have had abdominal/flank pain. Doctors have done multiple CT scans, Xrays, Ultrasounds, etc. and can't find anything. At the beginning, they did find a kidney stone and blocked ureter. But that has 'cleared up' since December. I do think it's either GI and flank issues or either a GI problem that has kidney issues with it. My GI doctor doesnt want to see my anymore and my urologist is almost at that point. None of my doctors, besides my family physician, think anything is wrong. Is there anything I could look into? My symptoms are: the pain, nausea/vomiting, chills, I get really nauseous when Im the least bit hungry. We checked with an ob/gyn and there isnt anything wrong in that area.