Lab Test?

my TSH was .347 low on a .450 - 4.500 reference interval
T4 4.8 4.5 - 12.
T3 37 24 - 39 %
Question is what does the low TSH mean?

ALSO
My Globulin, total, is that the same as SHBG? and if it is
mine was 2.3 g/dL 1.5 - 4.5 reference interval
Is that on the low end?