Sleep & Dreams

I have over thought sleep entirely. i even went all panicky. But seriously if you fall asleep will you wake up. I have also wondered if the moment you fall asleep is the moment you wake up mentally, and dreams are they real. Are dreams your second life or somthing and how come you have so many dreams at night but only can remember a few. Also how some people can dream the future my best friend can do that and so can i it's really trippy. Sleep and dreams are the kind of thing that are sooo trippy you can't even begin to comprehend like the never ending universe. Don't even get me started on that. It's just so trippy when you think about it.