yeh i felt like this for most of last year, during my classes i could barely remember or concentrate or conceptualise alot of the material to the point of humiliation. like in my group someone would instruct me on what to do and it was in one ear and out the other alot of the time. and zoning out all the time, sort of like staring at the walls not really thinking of anything substantial then i'd get home and nobody was around so i'd start singing and talking in different voices of characters from tv shows and i'd become erratic and jump around the lounge room, it was me releasing energy in a way.
i think alot of it comes down to not having a plan at all. its like i didnt have a plan to do anything so my surroundings were controlling me and my thoughts. its like if i commit to spending two hours painting or practicing basketball or playing guitar or doing homework at least im occupying my self with something logical and useful that distracts me from going a little crazy, because i believe that nothingness and no plan is what sends people crazy. because you are occupying every waking thought with obsessive or unhelpful thoughts.
but yeh, the people who go totally bonkers arnt even aware of their behaviour enough to admit it at least, because they are cluelessly lost in some trance of another dimension.