i have smoked marijuana habitually for about six months after doing much research on the negetive side effects. after finding that the side effects are minimal, i tried it and started using it more often. after smoking for about 4 months i noticed that my mental state was in a way groggy, like everything was slowed down, and my reaction to things were slower and apathetic, even when i hadn't smoked in a week or so. Is this effect permanent? is there a name for it?