1. (what I like to call) drained body. I've had it before, and its like your dreaming and your in such a deep sleep your body starts to feel like its shutting down. If this continues, I'd go see professional. help.
2. Is the outer body experience. If it happens again, keep going with it....see where it takes you.
3 sounds like a DEILD. try using some of the supplements recommended by Thomas. If not, then try to practice over and over again waking up in the middle of a dream, and falling back asleep with the same mindset that you go back to the same dream. It eventually will work for you and in no time, you will be a pro at falling back asleep to the same dream.