Kendra First Tried Cocaine At 13, Admitted To Psych Facility By 15!

All the dirt comes out in her E! True Hollywood Story, premiering tomorrow!

The Playboy playmate turned mom reveals that she had her first experience with cocaine when she was "about 13."

Kendra says: "All of a sudden they broke out this white stuff. I did it, and I started feeling this big ball of chalk going down my throat and I was like 'what is this ****! Ew this is so gross.' After that I started feeling pretty good. That was the start of my drug days."

And that's not all - by the age of 15, her mom Patti admitted her to a "secured psychiatric facility" for two weeks due to Kendra having suicidal thoughts and her drug abuse.

During her sophomore year of high school, Kendra "met a guy and I ended up running away with him." And for that whole year she did drugs "every day, every minute."

Crazy! Thankfully she recovered and found success on television.