Do you work during the day? Also, you didn't answer my question about whether the picking is something you are even aware you are doing most of the time.
The hours are combined I maybe take a 5 hour nap around 3 or 4 pm
Picking is a form of OCD. Usually it is to relieve stress. However, it can also become a habit. The good news is that habits can be broken. Are you always aware that you are picking your scalp or is this something you just kind of find yourself doing?
Also, as far as the sleeping goes, how come you are sleeping during the day? If I slept 15 hours during the day, I wouldn't be able to sleep at night either?