What do you suggest if i have been on antibiotic for four days and still have blood in urine. does it normally take that long to clear up?

Blood in urine: You may have blood in the urine for several days if you have a bladder infection. It is important to see if it is decreasing on antibiotics (A). If it is, the A is working, especially if the symptoms of burning and frequency are getting better. If they aren't, you need to speak to the physician who prescribed the antibiotics. Good luck.