Hello.
Thank you for posting your query at DoctorSpring.com
The very fact that you have abdominal discomfort along with increased frequency suggests that you are in all probability having UTI and you should improve with antibiotics.
You may have UTI even with nitrite negative. Stop worrying and enjoy your holidays.
Sincerely
Dr Rajiv Goel
MS (AIIMS), MCh (AIIMS), DNB ( Uro)