Thanks for your query.Based on the facts that you have posted it appears that your urologist
has probably done a test called as Uroflometry to study your urine flow suspecting you to have enlarged prostate
Post procedure you are getting increased frequency with urgency for urination .
This is due to inflammation of your urethra
due to trivial injury caused due to tube put in your urethra to do the procedure.
Please take broad spectrum antibiotics along with urinary antiseptic like Nitrofurantoin
twice daily and urine alkaliser thrice daily and anti muscuranic drug like Solefenacin or Darifenacin
that will help to control urgency,
If symptoms persists even after taking drugs for 2-3 days you will need f to get investigated
to rule out Enlarged Prostate.Many a time it does happen that it gets triggered after such minor procedures.
Thanks and Regards.