Hi, I posted here early but thought that I would try again due to some developments.
I have been feeling like there is a heaviness on my brain... it's almost like tiredness, or perhaps fatigue, but I'm not really sleepy. It doesn't clear up when I go about doing normal daily things the way I remember sleepiness to have done. That is, whenever I was sleepy, I would feel it if I was sitting in a class or something but it would go away if I was walking somewhere, etc. Anyway, I have this feeling, and sometimes I wake up at night feeling it worse than ever, with my body feeling detached from my brain. Then I don't want to try to sleep for some reason, because it's such a scary feeling I stay awake to "keep an eye on myself". Eventually I get genuinely tired and fall back asleep for a little while.
What could this be?