Is this yeast infection?

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I have just recently used my new dildo and I immediately had Acne on my right labia majora near the vulvar area. and a week after that my vulva started itching non stop and it became painful. i checked it and it had those bristle-looking tissues and they're quite so sensitive to touch and was painful. also, i noticed that i have that pasty looking gunk on my vagina — what's that? please do help me