Hi there, I've been experiencing this phenomenon for about 2 years now but recently it is getting stronger and more frequent. Basically I am lying in bed drifting off to sleep, when I start to feel this force building in me (I don't know whether it comes from me or outside). I will do my best to explain the feeling but this is going to be difficult.
First of all my head starts feeling much heavier, not just in a physical sense though, it just feels charged with some kind of energy making it more dense. Along with this I also feel a strange deafness (Like when you have a big yawn and your hearing fades for a moment), followed by a building ringing in my ears, to the point where it's very loud. By this point I am completely awake, trying my best to stay objective and not let fear paralyze me.
Then as it builds I get a strange feeling of motion, like I'm traveling at speed whilst lay in bed. I am not paralyzed and I can end the experience at will by just mentally blocking the feeling and 'coming out of it', but I usually want to go 'into' it more to investigate (despite my unease). As the feeling builds, so does my anxiety, and it eventually gets to a point where I have to snap out of it and come back to normal, as I really don't know what I'm dealing with. The feeling this gives me is not one of pure terror or bliss, but more like fear of the unknown. It is also rather uncomfortable with a kind of harsh tingly feel to the whole experience.
After I wake myself up (sweating and with adrenaline pumping), if I put my head back on the pillow I can feel the energy building again, washing over me exactly like waves and taking my hearing into that 'yawn-like' state. It really is very similar to being submerged by waves in the sea. I usually have to stay up for a while until the feelings completely fade, and even then I have a nervousness about going back to sleep.
I am especially scared of this feeling if I am alone in the house, and I have much less courage to investigate it (having somebody else there just makes me feel like I have some kind of anchor and won't get washed away by this energy). The other night it was such a strong feeling that I thought I was seriously in over my head (even thought I might be being abducted!) so just woke myself up and sat in bed for 20 minutes before falling asleep soundly (from what I remember).
I am nowhere near experienced enough to put a label on what this is.. could it be psychic attack, approach of the wave, work of higher centres (The past two times it has happened after practicing EE)? I really don't know. I know my description is not amazing but perhaps somebody could help provide insight, if you've had/heard of similar experiences?