Myb3 Year Old Daughter Went To Bed Just Fine Last

Myb3 year old daughter went to bed just fine last night and woke up at 7am complaining her tummy hurt and then began vomiting. And she has vomited every 5-10 mins and now it is only white foamy . She will not keep anything down. I tried oatmeal plain, toast, water. She tossed it all back up. Even medicine won't stay down. Gatorade comes up as well.

She can't get comfortable and is super irritable.

What can I do?