My 35 month yr old just woke up vomiting. chunks. no fever. still active , no pain and still talking. should i be worried. ?

Watchful Waiting: I wouldn't worry unless it persisted over half a day and he became cranky and started to get dehydrated or spiked a fever or the vomiting got worse or bloody or started spurting out like in "The Exorcist." At that point it would be time for a trip to the ER. If not, then try giving a teaspoon of liquid (whatever he likes) every few minutes and see if he tolerates it.Also, prepare for the diarrhea!