@lkirnbauer
I have had Hashimoto's for the past 15,5 years with lower thyroid hormone levels (nearly normal). No specific symptoms were associated with Hashimoto's for the first 12 years. Then, 3,5 years ago I was diagnosed with systemic sclerosis/scleroderma. This is when it started: fatigue, palpitations, food allergies, skin thickening, and joint stiffness.
Looks like most of the symptoms described in the original post by @tree98, may be coming not only from Hashimoto's but from other autoimmune conditions involving GI (IBD, Crohn's) and other systems. A full panel of autoimmune tests may be helpful: rheumatology, immunology, gastroenterology.
People with autoimmune conditions frequently have malabsorption causing iron deficiency and multiple vitamin B and D deficiencies leading to anemia and fatigue. It may be worth checking full metabolic panel.
Spectracell Labs and some others do in-depth micronutrient testing that shows where exact deficiencies are coming from, how the body is failing to utilize nutrients and produce enough energy. Insurances do not cover their tests - all out of pocket.
https://www.spectracell.com/