Frequent urge to urinate. Something.

Doctor, I have been suffering from the problem of frequent urge to urinate ( every 10-15 minutes)Which starts leaking when there is an urge. Whenever there is a pressure on the stomach this happens. This has been happening from 3 weeks. Last week I conculted a urologist on practo he practiced diagnosis test of USG scan of abdomen and pelvis, also urine culture and sensitivity test. After showing the report of it to the doctor he found it as a blader infection (cystitis). He prescribed antibiotics ( Zifi CV 200 and cital sugar free liquid) for 5 days but It's the 8th day, the problem has not yet been cured. This problem causes very much discomfort which affects my studies I can't sit for long. What should I do doctor please prescribe something.