[2big4mysize]

ask to see your blood work results and ask for a full testing panel for your next test.

It isn't fun tobe hypo so I guess you should be happy your doc says you are healthy but if you feel you are then look and see what your TSH is under 3 is now the endocrine society's recommendation for healthy.
there are lots of ways you can be hypo that will not show in a simple blood test. you can have thyroid hormones bound up in your blood and the level will look high unless the test included freeT4 and T3 levels.
you can have something else interferring with your TSH/ T3 negative feed back loop.

estrogen interfers with thyroid too
as does goitrogen foods we eat like soy and many of the acceptable veggies

see there are lots of ways you can have issues.