Good job! Brave astronaut! The other B vitamins can be stored in the body longer than thiamine.  You won't mess them up.  

I took my first 100 mg this morning. Let's see what happens. Still a bit nervous of messing up my other B vitamins since I don't have a B complex at the moment. Thanks for your replies Knitty Kitty!

No, there's no need to keep checking blood antibody levels.  The tests are meant to be used as diagnostic tools.  It can take several years for antibodies to completely disappear, if ever.   Do get checked for anemia and thyroid problems if you fail to bounce back.   I understand what it's like not to have family support.  You've got a large tribe here that believe.   Take care of yourself.  Sending hugs!  Keep us posted on your progress!

Do get checked for all kinds anemia, iron deficiency anemia, B12 deficiency anemia, pernicious anemia, B6 deficiency anemia.  Anemia is very common in Hashimoto's!   Anemia, Diabetes and thiamine deficiency are known causes of seronegative Celiac Disease.   You only need one gene for Celiac.  Welcome to the tribe! Keep us posted on your progress.  

Cyclic Vomiting Syndrome may be related to Thiamine Vitamin B1  deficiency.     Hyperemesis is a symptom of thiamine deficiency.  Thiamine deficiency symptoms can wax and wane mysteriously depending on how much thiamine is absorbed from the diet.  A twenty percent increase in dietary thiamine results in an eighty percent increase in brain function and decrease of symptoms.  Eating a diet high in carbohydrates can result in thiamine deficiency.   Many children on the Autism spectrum benefit from supplementing Thiamine.  See the research done by Dr. Derrick Lonsdale and Dr. Chandler Marrs' at the website hormonesmatter.com, or published on NIH pubmed.