When i was a young teenager i had hypothyroidism and took meds then i didnt need them. kept checking thryoid over the years always normal now tsh 5.45?

Symptomatic?: Are you also having some of the symptoms again?Like fatigue,weight gain/inability to lose weight,thinning hair, cold or heat intolerance,constipation,cool/rough/dry skin, decreased exercise capacity or new shortness of breath during exercise,or even menstrual irregularities?You may want to consider restarting levothyroxine to get that TSH level down to normal range and especially if with symptoms.