Do have your Doc. keep a close eye on it. I don't want to scare you but that was what my troubles started out with.....and led to my Lupus diagnosis. I didn't get diagnosed with Lupus until Nephritis had set in...I statred Chemo not long after my diagnosis (worked WONDERS!). Kidneys are very important things..you NEED them... so watch them carefully!
Watch for signs of water retention, when your putting out too much protien you'll start to retain water...that's my first sign that things are getting bad...my feet swell up. Has your Doc. mentioned doing a 24hr urine test?
I've had ups and downs with blood/protien in my urine, but with my past history I keep a close eye on things. First time I had Nephritis I was in horrible condition, second time wasn't nearly as bad, we cought it before it got totally out of control (and I had found a MUCH better Nephrologist!)
Best Wishes,
-Eric