Yeast infection?

I’m on my period and the last day or two the outer part of my vagina has been ever so slightly itchy. The inside has not been itchy at all. The other night I did shave and accidentally nicked myself. It really is only noticeably itchy when going to the bathroom and moving around a lot. Do you think it sounds like a yeast infection or just irritated? No funky discharge or smell. I do have two Diflucan pills from an antibiotic that I never had to end up using. Should I take one just in case to be ahead in case it is one? Can I get a yeast infection from taking Diflucan if I don’t actually have one?

I hate whenever my vagina feels off😩😩