Pain down there after using a toothbrush (I’m not sure if this is okay ask here, I asked “women” subreddits but thought it might be good to ask here too. I’m sorry if it’s not)

I Cannot talk to my mom about this really, I’m fourteen and anything like this is a very taboo topic with her. I have an electric toothbrush with interchangeable heads I use as a makeshift vibrator. It normally doesn’t hurt because I’m careful and make sure it’s “wet” enough down there so it isn’t going on dry skin. Ik it’s not the best but I haven’t had problems before. Anyways, i finished up about an hour ago, and like half an hour ago I felt pain down there. It was (and still is) in a very specific spot. It stings almost. I put aquaphor on it because that’s what I use for everything from dry skin, to lips, to healing cuts/burns. What else should I do? I don’t really think it’s something serious, but I might talk to my mom if I still feel pain on like Friday.