Was diagnosed with hypothyroidism but refused treatment. I get checked regularly still and this time test came back normal? What could cause this?

Hypothyroidism. Hypothyroidism refers to an underactive thyroid which is confirmed by lab tests showing an elevated TSH. If TSH is just barely abnormal, treatment could be considered based upon symptoms http://goo.gl/L0oOTB. However, lab tests aren't 100% accurate - there's always some degree of uncertainty so if TSH is barely abnormal & you feel perfectly normal w/o symptoms, it's ok to repeat & recheck w/o meds.