I'm a nearly 19 year old female. i have a consistent burning sensation/discomfort in my urinary tract even when not peeing, constipation, & diarrhea?

Consult your physici: There are a number of things that can cause this ranging from a yeast infection, to chlamydia, to other infections. There are also allergies, irritants, and other inflammatory disorders that need evaluation. I would recommend that you see your physician for further evaluation.

Need: a pelvic examination, urinalysis and possible stool cytology