Slipknot during workout, Pain ensues

The Chest and Back workout is somewhat familiar to me now, and I wanted to push really hard for this week. I put my Itunes on and had Slipknot playing in the background. The aggressive music made me feel like a bad ass as I pushed my hardest through the pull ups and push ups.

Tony Horton says that most people give up before they need to. From what I understand, you are supposed to push through the pain. No Pain, No Gain. So I did just that.

Before I could proudly beam about the fact that I had drastically improved from last week in regards to my repetitions, I felt a stabbing pain crawl up my arm and in to my neck. Before I knew it I could not even finish the Ab Ripper X workout because of the pain in my neck. All night it hurt, and today it is so bad that it is difficult to check my right side mirror when driving.

I know that when I get these pains I usually have them for days or even weeks. I hope this will not affect my workouts. What to do?