Thank you all for the warm reception and helpful suggestions. I will definitely discuss both the coeliac and blood sugar possibilities with my GP once she gets back from vacation. Fortunately she is usually very determined to get to the heart of my issues, but we haven't been in contact since I visited the the sleep doc in the spring. I kind of wanted to take a break from doctors for a while.
Thinking on your hypoglycemia suggestions, I find that I have to correct myself a bit as well. I wasn't 100% correct in stating that the crash is of the same intensity whatever I eat. In the past it has been somewhat reduced when I have eaten a medium-sized pure protein and fat meal without any carbs at all. This indicates that blood sugar may indeed be the culprit.
I guess the plan for now is to continue the NSD and adjust the protein and fat to carb ratio. I have tried to go low carb in the past, but it has proven difficult. Then again my determination has grown a lot as the pain of AS has worsened. Whether low carb works or not, I'll try to take my problem up with my GP once again.
I'll attempt to give a try to the stuff you mentioned, DragonSlayer, although some of it sounds pretty exotic. It would take a bit of searching to get it all together, except for the magnesium, which I am already taking.
Anyway, thanks again, and I'll keep you posted on my progress!
