How I feel, a visual explanation

The walls are dirty white and there is hard dark wooden flooring. There are three windows and another one on the ceilling but light never gets in because the windows are tainted. There is a wooden chair in the center of the room, and a book I've read a thousand times before but it still doesn't make sense to me. I try to open the windows but the locks are jammed so I'm stuck and I can't reach the window above me, not even if I stand on the chair. There is a door in the corner, it's small and red, and I can just about get through it. However on the door is a sign that says if I go through it there is something horrible on the other side, so I'm too afraid to venture out of this prison. Lying to the floor gives me bad back ache so I cant sleep and I'm allergic to the food that is dropped through the window above me, so I'm forced to starve.