I had a burning sensation in the last day bear my vaginal area, urinating often, and just now there is blood mixture in my urine. what should i do immediately before going to the doctor tomorrow?

Drink a lot of water: Make sure you stay well hydrated. Drink a lot of water and perhaps cranberry juice. It sounds like you may have a bladder infection. Your doctor can check your urine and do a culture of it. You will likely get a prescription for an antibiotic.

Drink fluids: Signs and symptoms sound like a urinary tract infection. Drinking fluids helps to dilute infection and something like cranberry juice helps to acidify the urine, which also helps.