Palpitations
Crushing fatigue
Headaches often
Sinus issues
Chest pain
High Blood Pressure
Depression and Anxiety
overweight
among tons of other things.
Can't know unless you have tests - TSH, free T4, and free T3. If TSH is above 2 and/or the free Ts are below the median lab range, you could have low thyroid.
Also, tests for thyroid antibodies - both TPO and Tg - might be helpful.