How To Treat Soreness And Blisters In Clitoris After Using Vibrator On Vagina?

I'm a female, I've been masturbating for days in a row using a vibrator and my vagina started to feel sore, now I have a few blisters on my clitorus right at the spot where I used the vibrator. I did have sex with my boyfriend once as well, but I've been masturbating more. Is this from masturbating or do I have an std?