I have been harmed by admitting my impulses or thoughts so I understand the fear. Having to be handcuffed and held against your will and treated badly is not anything that is worth it.

On the other hand, if the thoughts are so intrusive that you are desperate, then something has to happen. Perhaps hypnotherapy, but I have done that and I'm not sure it is designed for this.

It may sound like a low level response, but calling a hotline has helped me in the past. They are trained so they don't freak out and know what to do and say. It is anonymous so you don't have to give out personal info that would track you. That way you can be open and honest and not be fearful of consequences. I used to work on a hotline and I rarely called in anyone. Only when it was medically necessary. Otherwise I just stayed on the line as long as possible to help the person work through all the thoughts and feelings.