Hi For The Past 20 Days I Have Constant Urge

Hi for the past 20 days i have constant urge to urinate.i am 34. My gynec tested fir uti and the culture result had no growth of any organism. My abdominal and kub scan also showed normal. Currently she has put me on terol la 4 mg once daily and urispas thrice daily along with norflox 400 mg. How long shd i take this terol? Will this be cured with this 10 day dose or i must take these tablets lifelong.