Undiagnosed chronic flank pain

[Hallie21100]

Hi I'm a 16 year old girl perfectly healthy in all labs and scans of anyone can give any advice I would really appreciate it I've been multiple drs and no answer ..
I have a history of kidney stones for the past 3 years , I see a urologist and a nefrologist for them they both say stones are in no way causing my pain. I've had flank pain both sides off and on for the past year ever since my surgery in July to remove a kidney stone the pain has been getting worse and more constant and now in October pain everyday all day the pain levels vary mostly severe, I'm nauseous all the time and can't eat normally like I used to, as of the past week I am pale , eyes sunk in and lost 7 pounds in the matter of 10 days. I was admitted to Akron children's in Ohio Monday night stayed until Thursday and absolutely no answers , all labs are fine all scans other than shmoral nodes in the spine but drs say don't cause the pain I'm having or any at all. I went to Cleveland clinic er last night Saturday and again no answers I am referred to a gynecologist and GI. No pain meds work other than oxycodone. The pain varies, sometimes worse on one side than the other and sometimes only one side. Usually an aching pain sometimes sharp. I've had plenty of kidney stones this is not the pain. I have just went downhill since July and am at my last two options I can't go to school and sit up straight and standing hurts also if you have any suggestions I really appreciate it.