It's not that im in a "bad mood" or "mad at you." There's just days when my tongue feels heavy in my mouth and it takes too much effort to move it, let alone form a coherent thought.
My mind is at times blank and i can't feel my heart beat; I am a walking skeleton, the only reminder that i'm actually alive is the sound of my own heavy breathing and the slight shaking of my hands.
There's just days when i'm awfully nervous, for no reason. I'd rather keep quiet than explain how i'm feeling to someone that wouldn't understand.