How long should I wait until I eat again?

I just ate lunch and then I ate my princess snacks. Grandma Elizabeth told me it was unladylike to eat like that. She is very prim and proper. She says that I need to wear my crown all the time and I should definitely stop eating so much. She says that the 200 pounds I weigh is just not acceptable. She says my family is in the limelight of England to much. What should I do?