Can a really bad yeast infection cause blisters on the inside of the vagina ? be i tested neg for herpes twice

Genitourinary rash: Candida, or a 'yeast infection' in the female genital tract is usually characterized by a thick curdlike discharge with reddened, itchy vulva. I look for a 'cause' too such as recent antibiotics. Just blisters by themselves could be other disease manifestations - and ALLERGY comes to mind. Any new products used? I doubt it is herpes - that hurts more than itches. If it doesn't improve, see a gyn.