I have a 19 month old who has always been a bit challenging...she is very determined and in the beginning she was hard to get onto a good nap schedule, but for the past couple of months she has slept really really well with no fuss. Today she woke up after 45 minutes and started crying (she does sometimes do this and I leave her and she goes back to sleep), but instead of going back to sleep she threw up in her bed. I called her parents, thinking she was sick and they came to get her. However, her mom told me that for the past few days the child has been vomiting when she doesn't get her way about things. I am nervoud about tomorrow's naptime as with all of the commotion she woke everyone else up as well and I had very little break. Any suggestions on how to deal with this problem???