I take Synthroid, for 15 years. but, I am extremely tired all the time. Should I take Actalin along with the Synthroid? I am 84 years old. Appear younger and act younger, people think I am in my 60 s. But, if I would let myself, I could sleep all day. I don t have an Endocrinologist at this time. My TSH levels were check and came out good. I feel that I need to be checked further into the Thyroid. What do you think? GJ Jones