I have lupus nephritis and I was diagnosed with a kidney biopsy. My blood pressure is normal and so are all my labs except for an ANA of 1280. I also have diarrhea and had lots of protein in my urine. The main difference is I had lots of swelling, but I have membranous and it is characterisitic of nephrotic syndrome. You obviously have something going on. Good luck and keep us posted on your progress!
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