On Thursday, I Spent Most Of My Day In Wet

On Thursday, I spent most of my day in wet clothes, because it was raining. On Friday morning I ate half a liter of ice cream. After an hour of eating it, i felt sick. After about three hours, I vomited. Then I kept vomiting every half a hour, usually 2-3 times per one session. All I ate came back up. I then went to sleep. I was very tired, but couldn't lay down. I kept vomiting, and the amount if the vomit was about 0.7 liters. My system is quite empty now, I think. I vomited last time about a hour ago. I still feel sick and can almost feel like vomiting, but I can't since i havent ate anything. What is this? Im feeling horrible and this is the sickest ive ever been. I'm a 14 year old girl. I have no diarrhea.