I have the same symptoms even on days when I sleep and feel rested. I think the point is that everyone is at a different point on a line, but being aware that what is happening is very real will give you the chance towards healing instead of ignoring it.

Even if it is sleep or meds for you right now, there is no harm in being educated that cognitive dysfunction is a real part of the illness, one that can be very damaging if left alone, but easily treated without meds through mental exercises.