I Eat Slate Pencils From Past 2 Years. Have Tried

I eat slate pencils from past 2 years. Have tried to stop but i get the craving. I knw its nt good for my health hence i want to stop i cant even talk about this to my parents coz they think i already stopped. These days i m facing various problems i donn feel like eating food and feel pukish if i force myslf to eat so i m scared if it is bcoz of slate pencils. Plzz temme and temme how do i stop it