It does not sound normal or healthy. I would go to your regular doctor and have him do some tests, see if you have a deficiency of some sort (thyroid, vitamin D, etc.) and also start keeping a more regular sleep schedule, going to bed at 10:00-12:00 or so every night, for example, and getting up at 6:00-8:00, no matter how you feel. Our internal clock is on a 24 hour schedule and sleep is factored in there and if you mess with your wake cycle, you are also messing with your sleep cycle, and vice versa.