Hi Josh ~
Wow, your doc IS interested in seeing what's going on. As you stated, at least you'll have a much better idea of what is the source of your pain. I'm a little surprised he would do this so close to your surgery date, but he must have his reasons. I guess I would wonder, as you do, if he suspects that something else is going on to cause you so much pain. Obviously you have had more reaction than he normally sees.
Try to stay positive. By lunchtime tomorrow, you should have some answers. I will say that the nerves can become very touchy. Are you aware that what we call the "sciatic" nerve is really a big bundle of nerves and is the size of a pinkie finger?
I have acupuncture every week. The sciatic nerve runs under the piriformis muscle in the buttock and I often have a spot that is VERY tender. She knows right where to push to find the spot and I squeal almost every time. If this spot is continually agravated, the pain starts to radiate out and becomes highly sensitized. I think by this point you are probably one big, overly sensitized nerve mass.
The piriformis is often a source of pain and might be in your case, too. It is a fairly large muscle and the sciatic nerve wraps around it. If it becomes irritated or inflamed, the sciatic nerve can be compressed or otherwise irritated. This in turn makes the sciatic pain seem more intense. I am currently exploring this as a possible source of my nerve pain that prevents me from walking very far.
I'll be thinking of you this afternoon. Remember to practice deep breathing and try to stay as relaxed as possible before and during the myelogram, and remember that you will be glad to have the results once it is all over. How's your GF handling your issues these days?
Stay positive. Sounds like you have a good doc who's willing to work with you until he gets to the bottom of all this!!