Hi thanks for asking question. Noted your culture report is negative.So chance of urinary tract infection is very less. Rule out pelvic inflammatory disease like features by ultrasonography of abdomen.USG will be helpful with CBC. Meanwhile follow below instructions... -Drink more and more water -fruits taken more -avoid excess spicy and junk food -green leafy veg useful. -avoid stress Also examination your vaginal area.If erosion or inflammation present then it might lead burning during micturition. So according to examination by gynecologist it is treated if inflammation or erosion present. Wish you good health.