Im throwing up everytime i eat/drink?

yesterday i admit i did eat quite alot. i had mashed potatoes, mac & cheese, corn bread, cookies, popcorn, and hot chocolate. This was eaten all in about 2 hours or less (usually i dont have a big appetite, but i eat when im bored). so later that night, my stomach felt very bubbly inside & i felt Nauseous. i fell asleep, thinking it would go away, but when i woke up suddenly around 4am, i had to run to the bathroom because i felt vomit coming up. so i threw up, brushed my teeth, and started eating crackers. the crackers didnt help, because about 30 mins later i just threw them up again! after that, ate just one more cracker ( to see if it might help again...dumb idea.) and i puked up it up! i drank cold water, and puked. Thats a total of 4 times. i havent vomited since, but i still feel nauseous and feel like i might. im afraid to puke again, my throat is sore and i feel weak. im 15, 5'1, and weigh about 105 lbs (probably less now). Vomiting is NOT common for me, the last time i vomited other than today was about 2 years ago from motion sickness. and im not vomiting on purpose, its uncontrollable. i dont have any know eating disorders. Do have a stomach bug or something? please help, i feel like garbage and its new years eve. :(