What is ERP?

I have, alongside my other OCD themes, an intense fear of insomnia. Although this has been improving somewhat — partly thanks to medication and The sleep school on YouTube — I still find myself ruminating about it throughout the day when I have something important the next day, I get stuck in the fear that everything will be ruined — for both myself and others — because my mind is so preoccupied with sleep. + a fear of depression coming back. It honestly feels like a form of sleep OCD. I'm not sure if that’s an official thing, but that’s how it feels to me. A form of erp is the idea of befriending wakefulness. That works great tbh. Things like sleep hygiene, meditation, etc. — tend to backfire because my OCD latches onto them and becomes too obsessive about “doing them right.” I’m genuinely wondering whether ERP — for example in the form of a worst-case-scenario audio loop (imaginal exposure) — could be helpful in this case. I’m hesitant to start unless I know it can actually help. Is there anyone who has experience with this or thoughts about it? I’m not looking for reassurance or tips to fall asleep — only for ideas on how ERP might be applied in this situation.

I read about ERP and have seen information about it on here. One of the goals is to say, "maybe I am this or that...ect." That terrified me. The thoughts and images that go in my head are disturbing and upsetting. I don't want to even think about saying, "maybe this or that." It's devasting to have these thoughts and question why you're having these thoughts. Doesn't the "maybe" make it worse? The one thing that helps me is that is to remind myself that these are just thoughts and I know I'm not a monster, even if I feel like one. Is ERP not for everyone? Has anyone else had a problem with the techniques used in this kind of therapy? I had cognitive therapy for years with an OCD specialist and that seemed to help a lot. Writing out the worst case scenarios would make me suicidal. Im having a difficult time not obsessing over the "maybe" after intrusive thoughts now. It doesn't make it better.

I'm just laying here avoiding being an adult and wondering if during ERP the therapists are mean. Like, is it a "tough love" type of situation? That makes me anxious