Welcome to WHL.
Like you already said yourself, you have to be seen by a Rheumy.
Wow, I have never heard of a rash, that spreads from you thigh, all the way to your face. You poor thing.
What reason did your doctor give you, for the stage 3 kidney failure?
Make an appointment at the Rheumatologist asap., because it usually takes months, before you get an appointment.