What disorder do I have or could I have?

It�s not right of anyone to say a condition over the web without a proper psychiatric evaluation. However, don�t take this answer too seriously, but the symptoms you write could sound like Anxiety to me, but I am no psychiatrist. It could help to change your diet, to something more healthy. Maybe eat more of everything, depends on your current diet. Set yourself goals you know you can accomplish and discipline yourself into doing them.