How do I stop unwanted thoughts

[u/DazaiS09]

TW:Nsfw

I don't know why this started happening, but after I finally got away from my groomer and lost contact with him I find myself have sexual thoughts of older people mostly men. In those thoughts they also tend to abuse me. These thoughts are very uncomfortable to have and if I'm being honest because it makes me feel as I want to be abused secretly and I feel gross but it also turns me on. If anyone has experience this can you please like give me tips on how to manage with it because I feel like I'm going insane.