@AnUnlikelyWorldofInvisibleShad gosh it all sounds so familiar! I know exactly what you mean..
I get shoulder and neck pain, headaches, brain fog, nausea, stomach upset, lethargy and just a feeling of utter inertia. Like you not all at once but these symptoms have become so common place over the last two or three years it's almost become my normal and I've got used to feeling like it. I had my thyroid function checked routinely and had a massively raised TSH and my antibodies were through the roof.
I hope you feel better soon 
How often do you have to have your dose adjusted?