Crazily, as I am the one who began this thread...
I was in the emergency room this summer, and after all the tests, etc.,came away with no diagnosis, even though it was mightily agreed something was wrong. I endured another "episode" a few days later on a trip to Las Vegas, and did not go to emergency as we knew what it wasn't...and my pcp pre-empted the third attack a week or so later, as I was beginning to feel uncomfortable....by a fluke about two weeks later, I figured it out. The nuts which I was eating had been processed in a facility with wheat. I began reading the labels, and almost all the commercial nuts (Diamond, Planter's, etc) have this distinction. And as gluten-free and low, carb, I do eat nuts. So I found a company Nuts.com and replaced the nuts and seeds with certified Gluten free; and I noticed that the next time I had Greek yogurt, that I did not feel queasy afterwards, so I think I am not dairy sensitive, I think I am a super sensitive celiac and that it was the nuts which were the problem.
And its a bit crazy, as I had stopped baking about a year ago, as every recipe that I used, led to stomach upset, and I was trying to figure it out, is it the coconut? Is it this, is it that? I looked at a new package of almond meal from Trader Joe's and their product is processed in a facility that processes wheat; so I switched to the Nuts.com certified gluten-free, and I am fine with it. If it hadn't happened to me, I would think I was NUTS! So my son now laughs, and says purportedly gluten free! You have to read the label on the back. But very glad that it is not probably a dairy sensitivity. Of course, the scary thing is that so much of our food isn't actually food, or has been added to, or processed to increase the chances for those of us who have these problems, to react.