First of all El Mariachi, you don't call the ER. The person you speak with is often a LVN or triage nurse. If you continue to have headaches or worse (dizziness, blurred vision, etc); don't call the ER. They are there so people can be evaluated in person. If you go to the ER and your BP is through the roof or you have neurological symptoms (weakness, nystagmus, visual acuity problems), your ass is getting a scan pronto. Pulling your neck will not give you the worst headache of your life. It hurts like hell, but it will not put your butt on the floor. Also, you would think it would hurt if you palpated a certain area or moved your head side to side or up and down. If you are unsure, go to the ER. If you feel better, I would definitely have a buddy or wife watch you to see if you get dizzy or stuperous. My advice; I can't treat you over the internet, but people have gotten head scans for much less. Peace.