Blood in urine and itchy skin

I'm getting a CT scan in two weeks, but I'm getting scared. Now I'm starting to get nauseous. Is this a sign of kidney failure? My diet is good and I do liver flushes. I had hep C and did the treatment combo back in '07.
he blood in my urine is minuscule. I have an achy back, also.

What can I do in the meantime? I just saw the baking soda article. does anyone know how much to take? when? Before or so many hrs after meals?

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