My 9 Year Old Son Son Was At A Trampoline

My 9 year old son son was at a trampoline camp today. He said a couple hours ago when he got home that he felt dizzy and had a headache. He was also hungry and very tired. I gave him a snack, he rested and when he still had a headache, I gave him children's Tylenol. At bedtime, he said that when he lies down he still feels like he is jumping and he is having trouble sleeping. How can we get him to stop this feeling? Are these concussion symptoms?