Anyone else ever experienced this weird sensation:

sometimes when I'm in a half-awake state after sleeping or in the middle of the night I get this sense of something coming. It's kind of like an adrenaline rush--I can't say if it's an actual physical sensation or more an emotion in my brain, but I'm pretty sure my heart starts to race and usually I try to wake myself up or resist but I can't. Next, I feel this surge in my whole body like a giant head rush or like my body is caught in a breaking wave. I am aware of my environment and can "see" where I'm at, but I cannot move or talk (I used to think I could see, but now I think it's a dream state because once I thought I was waving my hand in front of my face, but didn't see it).

Once I was able to move when I felt it coming on, and then it didn't come, but usually I can't do anything. It FREAKS ME OUT! I used to think maybe it was spiritual, but now I think maybe it's just physical. Anyone else experiences this???