My son is 4.5 years old, he had vomited once in the morning, then after he ate then again 4 hours later. he was full of energy and when ever he had eaten today he vomited. fluid was clear first thing this morning, but later in the day it was due to when he ate. No fever, skin is a bit pale, but has energy. stool is a dark to light and was normal. I'm baffled