It appears that every thing seems in check except for your low cortisol, thyroid antibodies, estrodial,
Your antibodies are coming down probably from the increase in your selenium intake and your change in removing gluten/lactose from your diet causing inflammtion in the intestinal tract. Your renin and aldosterone where also on the low normal side. This is all an indicator of low pituitary out put which is reflective in all of the hormones associated with hypopituitarism. As your antibodies come down it there may be a strong chance that this will relieve stress on the HPTA. IT was your vegetarian kick and soy binge from years ago that got you into this mess coupled by your lifestyle choices which trigger this on going cascade of events, but at least now you are getting down to the bottom of things with thorogh testing. It just takes time to narrow things down one by one to rule out probably cause. i have sat on both ends and from a patient you want results now, but one the other side you are asking the Dr to figure out what is wrong expecting him to fix it over night. Unfortunately that does not happen. As long as you have a good relationship with your dr it will all come together, but you also must be patient in the process.