this seems to me a case of urinary tract infection
with classical symptoms of lower abdominal ache with painful micturition and associated burning throughout the day. it is advisable to get a urine culture and sensitivity test done to find out the causative organisms and then appropriate antibiotics may be administered if culture turns out to be positive. in the meantime , please increase your water intake to 12-15 glasses per day , this would help flush out the infection naturally.
in my practice i usually advise TAB norflox-tinidazole
500mg twice a day for days along with urine alkalinizer. you may consult your primary physician for prescription if agreeable.