18 year old female. december 2013 tsh level 1.447. october 2014 tsh level 4.212. free t4 1.05. t3 (liothyronine) 114.

Unclear if problem: Hi. The October 2014 labs are, strictly speaking, normal. Please check TPO and thyroglobulin autoantibodies. If one or both of them is/are positive, you could be in a very early stage of thyroid function decline in Hashimoto's. But, it could also just be normal lab fluctuation; if autoantibodies are negative, simple lab fluctuation is more likely. Good luck!