Major neck pain from hard workout

Following up from yesterday's post where I was describing my boneheaded attempt at working off a crazed food binge through hardcore exercise.  Well, not only did I nearly make myself throw-up, but I woke up with a major stiff neck today.  I can only look at people by turning my shoulders!  My relatives think I've been imitating Michael Jackson's robot the whole day.

When I crashed out of yesterday's exercise I already felt a strange kink in my neck.  And I think I've isolated the reasons for my pulled neck muscles: 1) I was exercising too hard, i.e., over-extending my punches and over-twisting my shoulders to try to squeeze out as much calorie burn as possible, and 2) taking long "water-breaks", hence allowing my muscles to get cold.

Now I totally blame myself.  I ended up having to take long water-breaks because my stomach was stuffed to the brim with the mountain of food I had eaten.  So, as a result, my muscles got "cold" but then I threw myself into the exercise with a vengeance whenever I restarted the video.   

I'm going to do some research and self-experiment to see how to nurse my strained neck muscles.