Have they done a 24 hour collection test, to see what function is like!
As even though you might be testing positive for protein, it can mean that it's just leaking at this stage, you wouldn't normally expect to see a kidney specialist until your kidney damage reach a stage 3, the good news there is a lot you can do to turn this around... Damage lower than stage 3 can be reversed, but good diabetic control, keeping BP low etc... Even if you hit stage 3 and 4, it's possible with good control etc to keep things at bay maybe improve the situation but avoid total renal failure...
So yes be concerned, but don't panic just work on improving control etc..