Do you have a psychiatrist or a diagnosis other than SP? Are you on meds? If so, have you given your shrink a call? It might be something as simple as a medication adjustment.

Sleep paralysis is strange though. I've read a lot about it and have a lot of questions, but then I think that everyone who has experienced this has a lot of questions. I have had some very strange, hallucinatory experiences related to sleep that I've never gotten good explanations for. When I was having them frequently though (quite a few years back) it WAS exhausting and destabilizing.

In the city where I live there is a sleep clinic, highly regarded. Could you get a referral to such a place? They might be able to help you.