My 3 year old won't stop throwing up! :(

Sam I am

So my 3 year old seems like she has a bit of a bug. She cannot keep anything down. Started throwing up last night and has not stopped. She can't even keep water down and I am getting afraid of her becoming dehydrated.

I tried giving her a teaspoon of water every 15 min and that is not helping either. Any suggestions are immensely appreciated