Talk to Urologist on Burning In Urethra

for 2 weeks i feel burning in urethra in penis. after that i had consultation with a urologist and they recommended me urine culture which came ecoli positive. then i had undergone antibiotic treatment of ofloxacin which was sensitive in my report. along with that i drink plenty of water and hand cranberry vitamen tablets. now after the course is over and its been 10 more days gone i feel little burning in urethra and i also feel heaviness under navel. please doctors guide me i am worried.