Is It Possible To Stop Intake Of Synthroid When Suffering From Hashimoto S Disease?

I have Hashimoto s, Dermatomyositis, Sjogren s, Raynaud and also Celiac disease. I was diagnosed with the Thyroid problem several years before the other autoimmune diseases were diagnosed. I am currently in remission & off medication for the DM after many years of treatment and a dramatic change in nutrition . I am wondering if there is a possibility that I could ever support my thyroid enough to get off of the synthroid. I recently read Vitamin A might help, but the pharmacist said they do not carry it because of the possibility of getting too much into your system?!? Is there any protocol that I could do in addition to medication to support the thyroid. It seems when my thyroid goes in the tank the other conditions freak out, which I would really like to try and avoid if possible. I am very active and a competitive golfer who does a lot of traveling. Any suggestions are most appreciated.