Yeah I was really stupid yesterday!! My friend and I we were rocking out and well we kinda headbanged a little too hard and now my neck reeeeeeeeally hurts!!!! It's like if I move it at all it feels like a charlie horse!!
Try an ice pack for 10 minutes, then a hot, damp towel for 10 minutes. Alternate these for an hour. The cold will help any inflammation in the muscles, allowing the moist heat to work and loosen them. I hope you feel better.