Latex allergy or yeast infection/uti?

My vag is BURNING ive never experienced pain like this before. I have a dire urge to shove an icepack up there for relief. I’m going to the gyno next week originally scheduled to be checked for a yeast infection/uti since ive been feeling symptoms. I used a condom on a dildo just so I didnt spread anything but this burning sensation is new. Do I take benadryl just incase it is in fact an allergic reaction? What else doni do besides that?