What Causes Stinging Sensation While Urinating And High Level Of Vitamin B12?

Hello, I ve been experiencing some issues urinating for the past few months, occasionally when I urinate it can sting and its like a hot feeling. I have been to the doctors and after urine tests they found trace amounts of blood in my urine. I have had a CT Urogram and they found nothing wrong with my kidney or liver function and have found no urine infections. I also have burning sensation in my feet at night time or when I m walking sometimes. I have had a blood test s done checking for diabetes but they came back negative. The blood tests came back with a high level of vitamin b12 though. Other than the urinating and the feet I have no other symptoms or issues. I am going to see a neurologist but the date for the appointment could take months and I would appreciate if anyone could give me their medical opinion Thank you.