Hey GJ's~ From a Mom who has a DS w/a kidney transplant... Let me ask a couple of ????? Do you have any pain or burning when voiding? Is your urine frothy looking??

All it takes is a blood test to see if your creatinine or BUN are elevated to show kidney function. A urine sample would show if there is protein present. But, I agree w/Vic in that you should contact your PCP tomorrow if it's still bothering you. Not all back pain in the kidney area is from the actual kidney. Better to be safe than sorry, so I'd follow up on it.

Good luck and keep us posted.