Itchy vagina. burning sensation after i urinate. no discharge. what is this?

s has been going on for a few days now. when i awake in the morning i have an itching feeling inside my vagina and when i urinate there is a burning sensation only when i am finishing. the uncomfort of this usually disappears after a couple hours after i wake up but continues to be there every time i urinate and then again the next day upon awakening. does this sound like a yeast infection or perhaps a UTI,STD or something else i haven't considered..