Tgab help.

I don’t understand- my lab says <1 .. but some ranges list under 40 or 20.

My result tgab was 18, I have a lot of hypo symptoms. TpoAb was 2.

37F, 200lbs, Tsh 1.07, ft4 1.0, ft3 3.8

I’m dealing with a lot of possible overlapping symptoms and illnesses. Scared of being dismissed by drs like I have been in the past and desperate to outlive my moms passing at the age of 65. She was very sick (lupus, chf, thyroid removed, pre cancer etc)