I just took 20 15mg gel caps, robitussin. I'm 13 years old.?

What if you die? Well, you die. That's where you lie down, hold your breath forever, and they shovel dirt over you. What are you, 10 years old? Depending on your age and weight, you may or may not become violently ill. You also may or may not have done permanent and irreversible damage. This is a very dangerous game you're playing. There is nothing glamorous about drug overdoses. There is nothing exciting about lying in ICU with tubes and needles stuck everywhere. There is nothing attractive about spending weeks in a Psych Ward, or possibly winding up in a Foster Home. All these things can happen to you if you keep playing these infantile overdosing games. Stop doing it. Or die. Your choice.