What is the worst thing that can happen to a person who overdoses on a drug?

Ihave a really high metabolism and only weigh 70 pounds (13 almost 14). people always ask me two questions: do you ever eat and how do you eat so much and stay so skinny.i am worried that a high metabolism wont me forever. what are some safe steps i can take to maintain being fit. (also, i already work out i am a dancer so i get cardio a lot)

Me with this i need to get the answer quickly.

Hi friends? i need new friends who are 18 years and younger im 16 lets be friends