You sound pretty normal to me to be honest, just maybe a little depressed. I'm no psychiatrist, but you already said you're going to see one so you're on the right track.
As far as school goes, you and I were in a similar boat. You failed classes because you were in it for the wrong reasons. Go back, take introductory classes that interest you until you find what you want to pursue. School can be expensive, but you wouldn't be the first person to spend more than four years getting a degree.
You're just in a rut, and oversleeping, and dreaming is a side effect. The only advice I would give is to start exercising regularly, eating healthy (assuming you don't already), and talk to a psychiatrist.