When I had my main breaks and still sometimes now I used to feel I was being forcibly penetrated it’s awful and very scary considering at the time I couldn’t recognise it as hallucination and like you I’d feel dirty. I’d just be lying down or even sitting up when it happened but I agree with James, you need to distract your brain, this isn’t a force against you it’s just synaptic dysfunction in the brain, too much firing when it’s not supposed to be. I have playdough that I ring in my hands to provide different sensation and I’ll have a shower to provide that sensation, I think scratching your head is a good one too!
You’re not alone with this and I think distraction is the way forward, with time you’ll be able to divert your attention and stop them quicker. Good luck and keep posting, take care,
Meg.