I would really suggest following up with GFinDC suggestion and get tested for celiac. Your complaints about the fatigue, joint issues, fog, anxiety, depression and worsening ADHD are all things I used to get in highschool way before my diagnosis. See about starting the gluten challenge of eating it daily for 8-12 weeks and getting the blood test. If you feel it will interfere with your life, try taking like a tsp or 2 of vital wheat gluten before bed and trying to sleep it off.
Knowing the issue will be a big relieve and will help with sticking more strictly to the diet and getting support from family and doctors about the diet.
Eat meats, veggies, buts and eggs. Skip all the processed foods and also dairy and oats for a few months at least. It can take 18 months to a couple years to heal from celiac damage. The simpler your diet is at the beginning the easier it is to identify troublesome foods. It is also good to cut way down or eliminate sugar, and carbs for a few months.
Keep going on the gluten-free diet. It can take 18 months or more to heal, sometimes several years. Try reading the "Newbie 101" thread in the "Coping with Celiac" section. It has some getting started on the gluten-free diet advice.
The best way to start the gluten-free diet IMHO is to stick with non-processed foods. Things like meats, veggies, nuts, eggs. Skip the dairy and oats for a few months. Avoid sugar and carbs. It sounds like your keto diet should be doing these things already. That's good!
You also need to watch out for / avoid gluten cross contamination. Even a small crumb can cause an immune reaction.
Another thing to do is have your vitamin and mineral levels checked. You may be low on some nutrients that your body needs to heal. People with celiac are often low on B vitamins and vitamin D. Sometimes iron and selenium too.
I am assuming you don't want to do the endoscopy and get a full diagnosis. If you are planning to do the endoscopy you should be on gluten for a couple weeks ahead of time.
Hi, yes, you can have an allergy and a food intolerance. Allergies are IgE immune reactions, food intolerances are IgA or IgG immune reactions. You can get tested for allergies with a skin prick test.
They test for celiac disease with a blood test first, and then an endoscopy later.
The celiac blood tests are:
Total serum IgA
Each of these antibody tests have a range of possible values that varies by the lab. You need the ranges to interpret the test results.
The 2nd test is the endoscopy where they take 4 to 6 small biopsy samples of the small intestine lining. Then they check the biopsies with a microscope for damage characteristic of celiac disease.
There is also the DH (dermatitis herpetiformis) test. DH is a skin rash that only people with celiac disease get. They test for it by taking a small skin biopsy from next to a lesion. DH tends to appear in a symmetrical pattern on both elbows, butt cheeks, knees etc. DH can be very itchy also.