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I'm sorry that you are feeling so poorly. No fun at all... but I truely doubt that your symptoms are all from celiac disease. The acne, joint pain and swelling,weight gain, and cold intolerance sound a LOT like Hashimoto's or even a different rheumatic disease. I went through something like that after I had been gluten-free for 2 months: my hair was falling out, my joints in my arms hurt to do simple things, I was extra fatigued... it was all around the time I started taking hormones for my hypothyroidism. I think the change in hormones caused a worse Hashi's flare up OR another autoimmune disease was triggered into acting up (I suspect lupus).  Because I had already been gluten-free for two months, i didn't think going gluten-free caused my increased symptoms but I can see how it might appear that way.

Stay on the gluten-free diet. there is absolutely nothing in wheat, barley or rye that is crucial to our good health, in fact even for completely healthy people it is best to limit those foods. I can't think of any reason that being without those three foods would cause a health decline.  On the other hand, many people discover other health problems once a different health issue (like celiac) is under control. It's almost like the body relaxes a moment and then allows this other problem to express itself.... kind of like how it is so common to get sick when you start a vacation.

I suggest getting your thyroid tested. Request a TSH (should be near a 1), TPO Ab (should be next to nothing), Free T4 and free T3 (should be in the upper 50-75th percent for your lab's normal range). To me it sounds like your thyroid is under attack.

Other things to ask your doctor about might be Raynaud's, lupus and even rheumatoid arthritis.  You might want to get your vitamin levels rechecked too since you were so badly malnourished just a couple of months ago.

Best wishes to you. i know it's tough when you get thrown a curve ball just when you think you should have it all figured out.     I hope you find answers soon. Feel better.

Actually, in wheat there is magnesium. Grains are actually nutritious. The only bad thing is the gluten usually.

It takes me 1-2 days to react most of the time. The previous poster's thought of it being a more minor CC that takes a couple days to show up is my thought as well. I am careful not to consume direct gluten, but suck at being lax and eating out and taking the chance of CC. It is hard that it takes a couple days to show up, it makes it harder for me to pin point what made me sick.

I think it varies from person to person.

I have suffered from hypoglycemia for years. I have read that many others here do also.

I thought of this topic because I had to drink Glucola many years ago. The doctor checked my blood sugar an hour after. My blood sugar registered 80 and she marveled that that was low even for fasting! I felt sick for a week after that experience and promised myself that I would never drink that stuff again. That happened 18 years ago. If Only the doctor would have pressed to look into that.

Does anyone know if there is a problem absorbing sugar as well as other nutrients?

You shouldn't drink or eat anything that goes into your system so rapidly. You need a slow release and yes, a lot of people absorb sugar too fast who have gluten sensitivity/celiacs. Also, if they don't eat enough, too. We also use up our "carb points" over the years and can't handle many carbs. Sometimes, eating 5-6 hours apart works, especially with fruit, too.