Here is some Iodine info that may help you further; 200 mcg is IMO a drop in the ocean when it comes to correct an Iodine deficiency. Thyroid issues (hypo, autoimmune) are connected to Sjogrens`disease. Probably adrenal issues as well.
Ps; Seroquel is a medication that often cause mouth dryness. The intake of boron may just have highlighted this, or a need for more iodine. Boron is the main mineral for the para thyroid gland, as iodine is for the thyroid
My best suggestion is to read, educate yourself; this forum has some exellent educational material. Start with the RRR`ed threads. And about the co-elements that are needed with iodine, like selenium.