New england journal symptoms and conditions

I have been on Synthroid for about 15 years for hypothyroidism. A few months after starting on it, I became sluggish with just no energy and my once thick hair was getting thinner and thinner. I told my doctor but she shrugged it off saying it was just my age (which at the time I was 45). She being the doctor, I assumed she was right. But awhile ago I started doing research and found in The New England Journal of Medicine that they were finding that Synthroid caused hair loss "in some people". It suggested using a thyroid hormone that used both T3 and T4 rather than the single one that Synthroid is. I went back to the doctor and she put me on Armour Thyroid. I have been on it now for 3 months, and my energy levels are way up, no longer sleeping my life away. My hair has not started growing back in yet, maybe it never will after all this time, but just feeling better is such a plus! (Of course I would feel a LOT better if my hair would thicken up again).