I cant stop throwing up?

Hey, so this morning I woke up because I felt like I had to throwup. As soon as I sat up I threw up about 10 to 15 times in a row snd laid back down. I kept getting hot and cold. When I woke back up not very long after, I sat up and threw up another 10 times. Right now im just laying on my bed. My mom hasnt given me any medecine or anything. & I havent aten or dranken anything yet. What is causing this? The other day I fell on my longboard and got some really bad road rash , its starting to get infected and swelling a lot I cant really walk. Would that have anything to do with it since my immune system is trying to fight off the infection? Thanks