I'm 15, Not Sexually Active, And I Have An Itch

I'm 15, not sexually active, and I have an itch in my vagina that has literally been so hard to deal with that it's woken me up in the middle of the night. I've only been having the itching sensation for 17 hours, but I'm still nervous. I didn't notice is but after I peed, my mom told me that my pee smelled like vomit. I'm nervous to tell my mom about the itch, especially if it's not something serious. Please help!!!