Hi thanks for your question. The way u have described the small blisters on hands and feet and later inside nostrils and itchy fits
to hand foot and mouth disease. Its a self limiting viral disease and generally require symotomatic treatment like calamine
lotion for local apply and antihistaminics for itching.
The urine pH varies with the type of food and fluids intake. I feel you should not worry about your urine pH result as othet parameters are within normal limits..
I wish I have cleared your doubt and decreased your anxiety