I want to add something. I have experienced sleep paralysis many many times. I noticed that it usually happens when I sleep on the back or when I sleep during day time.So I always make sure that I sleep on sides because you know how terrible it is when sleep paralysis happen right?hehe Still it continues to happen every now and then.

I am also curious to know whether I might have done astral projection without my awareness. Who knows, I might not remember. I have done lot of lucid dreaming though. Almost all the dreams I see prior to waking up are all lucid dreaming.