I have been dxd with subclinical hypo thyroidism. I am very tired. How is this treated?

Not subclinical now. Subclinical means not clinical which means you are not having symptoms from the hypothyroidism, but you do have symptoms (tired). Thus, this is not subclincal. If you have the lab result to support hypothyroidism, along with your being tired, treating it is a reasonable course of action. Thyroid hormone replacement is quite easy and with correct dosing, side effect is rare. Consult doc. Good luck.