Vomited three times and no obvious signs of sickness? What could this be?

[minimatron]

hey carmen, sorry about the typing...dd2 in one hand!!!
DD1 has been vomiting for the past few nights too.Shes still her happy self just off food a bit. With the bottles, i have been giving half milk half water and she has been ok with that. Give that a try.... good luck

[Carmen2]

Thank you ladies... I will definitely take your advice and continue feeding her as long as she demands for it. DD has never suffered from a stomach bug which is why I get all nervous as there are no obvious signs of other sickness. I feel bad watching her throw up which I think DD realized it too. It's so heartbreaking watching your little one sick... I think this is my weakest part which preventing me from becoming a great, supportive mommy!