Almost 3 Weeks Ago I Had A Colonoscopy. Several Days

Almost 3 weeks ago i had a colonoscopy. several days after and since I am having bladder pressure after i urinate and feel the need to urinate frequently even though I am not voided much urine. I have been checked and do not have a UTI. I am on my 2nd day of Pyridium which doesn't seem to be helping. I am actually quite miserable right now.