You mention wanting to sleep all the time, have you asked your doctor about possibly being anemic? A few people I've known in the past have had very similar problems with never wanting to get out of bed, etc, but of course that can be one of a million things. I just figured I would chime in my 2 cents.

On a side note, I've actually done quite well with the Centrum vitamins and taking an omega 3 suppliment as well. I definitely notice it on days when I forget to take them. I've since decided to carry around at least 3 days doses in case I'm caught anywhere for a period without them.