Considering all the stress you're under right now w/your living conditions, it could be a yeast infection or a bacterial overgrowth.

Dehydration, stress, eating too much processed food/sugary junk food/dairy, not enough sleep, all those things can lead to either problem. I think they have an OTC for yeast infections, but for the bacterial overgrowth, there's not a whole lot you can do other than change your stress levels & ride it out, or get a prescription antibiotic vaginal cream/gel/suppository.

Don't douche & don't over-wash, especially with highly scented, drying soaps or body washes/shower gels - the more you irritate the tissues in the area, the worse it'll get and you could give yourself a skin infection on top of it. If your outer folds & inner thighs get rashy pick up some Desitin or other diaper-rash ointment & use it for your outer skin until you can get to a doctor. It'll also soothe some of the itch. Aveeno makes some mild oatmeal lotion, too.

I've heard you can douche w/thinned out, plain, unsweetened yogurt & it'll help bacterial overgrowths, but it's kind of hard to find plain unsweetened yogurt with no additives/preservatives.

Feel better soon & try to get some rest!