Hi Kat,
I was diagnosed in October, but I had been dealing with this disease for over a year. I have hypothyroidism too, so initially I thought my symptoms were because of that. But I kept getting worse really fast. Dry eyes and dry mouth were actually the last symptoms that hit me. Long before that, I was getting horrible fatigue (that was the worst - I was practically bedridden). Then my feet were freezing cold all the time, which I now know is Raynauld's Syndrome and is apparently very common with autoimmune diseases. Then came constant headaches, joint pain, and everything else.
When I got to see a rheumatologist, and finally got a diagnosis, he put me on Plaquenil...that medicine has been a lifesaver. I'm still not "normal" and I still get tired easily sometimes and have to pace myself, but I am much, much better now. The fatigue isn't anywhere near as bad as it was, and the joint pain is mostly gone. At least now I can actually have a life. You should talk with your doctor about Plaquenil, if you haven't already. A lot of people with Lupus or Sjogren's Disease have been helped by it.
Now I'm going to say something which some people might not like. But please be very careful and skeptical about the whole "gluten-free" thing. It has become a huge fad now. Suddenly, everyone is allergic to gluten. There is even a "Gluten Free Magazine." Unless someone has a true, diagnosed digestive disorder which causes them to be allergic to gluten (like Celliac Disease), then there is no basis for believing that you have any kind of allergy to gluten. This sounds just like the "Atkins Diet" that was super popular in the late 1990's. Remember that? And look now, does anyone talk about it anymore? Please be careful about jumping on the "Gluten-Free" bandwagon.
I seriously doubt changing what you eat will have much impact on an autoimmune disease like this. I would be skeptical in general about thinking that a change in diet will suddenly, magically cure a systemic autoimmune disease. Unless you are actually deficient in certain vitamins and minerals, then changing your diet just isn't going to have much of an impact. Of course, it's important to eat properly to maintain your health (and prevent health problems from getting worse), but changing your diet is not going to magically cure a disease.
What will help is to be sure you tell your doctor about all your symptoms, especially any new or worsening ones, and to listen to your body. Get plenty of rest and try to avoid stress as much as possible. I don't know if you have noticed any rashes or light sensitivity, but you might want to consider using sunblock, even in the winter. My rhumatologist said that Sjogren's Disease can cause sensitivity to ultraviolet light and cause rashes. It might even trigger a flare where you get worse symptoms or a relapse of symptoms. You read about that with Lupus, but apparently it can happen with Sjogren's too. I get rashes on my arms (although honestly, there are times when I still feel like I might have Lupus).
It's good to educate yourself too, and try to learn as much as you can. Just be careful about where you get your information. There is a lot of junk on the internet, and you have to watch out because there are a lot of bogus health guru websites out there claiming to have the cure for everything with some "herb" or "supplement" they're selling. And others will claim that a "gluten-free diet" will cure everything from hypothyroidism to cancer. I'm surprised that someone hasn't tried to say it will cure measles yet. You have to get your information from reputable sources. I get mine from government websites and actual reviewed medical articles. To me, this disease is just too serious and life changing to mess around with.
Like a lot of other disorders, Sjogren's Disease can hit people to varying degrees. Some people might have minor symptoms like just dry mouth and dry eyes, while other people (like me!) will have their lives turned completely upside down. The good news is that there are treatments available. Unfortunately, as you probably know now, there is no cure. But there are medicines and treatments which can make things a lot easier.