My neck has locked up or something on the left side! please help!?

I am eleven turning twelve friday & i woke up & my neck was hurting really bad on my left side so i tried to stretch it & it caused a lot of pain! i put some icy hot on it earlier & it didnt help at all. so then i got a rag and soaked it in hot water then wrung it out & kept it on my neck for about thirty minutes. it didnt help. Do you know anything that could help without going to a chiropractor?