I'm 16 haven't been diagnosed with anything yet

by diet is all over the place everyday I fail to walk away from the temptation of food 

yesterday's meal was coffee cream and sugar -94 cal in total

a smoothie Reece's cups and a slice of pizza which was eventually purged    ?? -cals 

i need someone to help and motivate me honestly 

purging gets harder and my gag reflex is practically nonexistent