Suggest Treatment For Pain And Blood In Urine

hi I recently started eating healthy and light exercise and this morning I woke and and had painfull urination at the end and then a few drops of blood this happened four more times today I have been drinking 2 liters of water a day and quit drinking caffeine at the same time I started eating and exercising it has been two and a half weeks and I've lost 20 lbs and I just went to the doctor last Wednesday and he drew blood