Hello and welcome to HCM.
Thank you for your query.
Symptoms of a UTI include:
-Burning sensation while urinating
-Lower abdominal pain
As the only symptom you have that matches a UTI, a urine analysis would be required to make a diagnosis. But, as your urine analysis also returns negative to bacteria and pus cells, it is highly unlikely that you have a UTI.
It is best you undergo an ultrasound
of the abdomen and pelvis to help in making a diagnosis. But, as of now a UTI is ruled out. Please discuss with your doctor to consider other possibilities.
I hope I have succeeded in answering your questions, you could write back to me anytime for further clarifications.