So Recently My Boyfriend Bought Me A Vibrator. The First

So recently my boyfriend bought me a vibrator. The first time he used it on me with lube and it was fine and I never had any problems. I'm now back and since I'm away from him, I've been masterbating a lot more than usual and I didn't think the lube was necessary and after two times of use, my whole vulva and clitoris area feels kind of sore. It seems inflamed and there is little areas with raised bumps it seems but nothing is coming out of them and they don't itch or smell. It looks kinda just like an open sore. I'm thinking I possibly just went overboard and the material it's made of caused me to chafe, so today I applied neosporin to it, in hopes that it heals some. But I wanted some help for what other things I could do