If you have one auto-immune disease, you are more likely to have another one. There is an easy blood test for Celiac Disease, but many people who are gluten-sensitive will test negative for CD. It is possible that you might see some improvement - specifically with your GERD and your anxiety - on a Gluten-Free diet. I know that my arthritis went away, I felt better mentally, I had more energy, and I slept better within 24 hours of starting a GF diet. A LOT of people have their GERD get better on a GF diet, as well.
DON'T START A GF DIET BEFORE YOU GET TESTED!!!!! - it can alter the results of the test. Most doctors will be willing to do the test without you having to come in for a check-up.
While you are waiting to hear from your doctor, please go to
www.celiac.com - there is a treasure trove of information on that website, and you will find lots of links to other sites as well. A GF diet is relatively easy to follow, once you figure it out (it usually takes about a month to work out the kinks), and more and more GF food is available both in grocery stores and in restaurants - many of them have a GF menu available right in the restaurant.
Also have your Vitamin D levels checked - most people have low levels these days, and a lot of health issues are being linked to low D levels. Celiac Disease is a disease of malabsorption - once a person is on a GF diet, their intestines start healing, and they start absorbing all of the nutrients they are eating.
I don't know about anyone else, but for me, it was almost like a miracle when I stopped eating gluten. It didn't seem possible that changing one simple thing in my diet could make that much of a difference, but it did. Best of all, I didn't have to take any special medications or buy any special supplements. It was the simplest "cure" (I have to stay on a GF diet for the rest of my life) that I ever heard of.....
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I don't mean to imply that a GF diet is a cure for MG - it helped with OTHER issues that I had. I do think that it has helped with some of my MG symptoms, though)
I just read your other responses - if you have hypothyroidism, your mom has Fibromyalgia, and your granddad had MG, EVERYONE on that side of the family should consider getting tested for Celiac Disease. Like I said, go to the celiac website listed above and start reading - many people are gluten sensitive, will never test positive for CD, but will DEFINITELY improve on a GF diet (my husband is one of those people). If you do test positive, you will want to either monitor your son for symptoms or just start him on a GF diet, too (trust me, it's easier to have the whole family go GF....). Celiac Disease/Gluten Sensitivity runs in families.