I started with 1/2 Iodoral tablet each day for several days. It actually made me feel better (more energetic) and w/o much side effects. Going to a full tablet/day brought detox symptoms.
As for you hypothyroid symptoms, I urge you go get all the appropriate blood tests. The results would serve as your baseline moving forward. Then in several months you can have these tests done again and compare results. If you are indeed proven to be hypothyroid then I suggest getting tested for Hashimoto's thyroiditis, an autoimmune disease.
Lastly, do a serious reflection of your dietary habits and make necessary corrections. "you are what you eat."
PS - no doubt if you are hypothyroid your doctor will prescribe something like Synthroid. Of course it is *your choice* as to when/if you take this drug. Most on this forum would probably suggest holding off on any HRT until all reasonable alternative treatments have been tried.