I had a kidney biopsy done 5 years ago. I was awake for the whole thing but they give you something to relax you and they numb your kidney so it doesn't hurt. You do have to lay flat on your back for 6 hours afterwards but it isn't bad. The next day I had some mild pain but nothing major. I would not be afraid to have another one done. I would rather have that done than a colonoscopy! Good luck and try not to worry, it isn't bad at all.
DX: Kidney Disease, (? Lupus Nephritis) 2002
DX: Raynaud's Phenomenon and Lupus (SLE & Class V Lupus Nephritis) 2005
DX: Anorexia and Hypokalemia 2006
meds: plaquenil, amiloride, klor-con