Staring

I am 17 year old male. Over the years ive acummulated what i would call “brain fog” i dont think its because of stress or lack of sleep but its like i cant think or remember. I feel like im living a second in the past. I have no will or interest to do anything. I dont feel sad i just feel blank like a peice of paper. I just want to sit and stare at a wall. I want to do nothing. To sit and stare at a wall with absolutely nothing to entertain me except my own thoughts is what i want to do. I dont want to work or study or anything. I just want to look at a wall till i die. Is this normal? Because im not sure its healthy.