RD,

CRF (cancer related fatigue) and "Chemo Brain" are fairly common issues directly after treatment and some experience both for quite sometime afterwards. Many of us may never see energy levels or cognitive function like before we went through treatment, it's part of the "new" you. What you are describing sounds a little different due to the fact that you were active just over a year and a half ago.

If you did have radiation to the H&N area it could explain the issues as the rads will continue to effect you over time, it really is the gift that keeps on giving. So it could very well be your thyroid so getting your TSH levels checked is a good idea.

You don't say specifically what sex you are but I'm assuming from your post that you're a man. If that's the case it could very well be age related...andropause. Andropause is caused by the gradual decreased testosterone production in men. Men lose between 1-2% production of "T" per year after the age of 40 anyways, but in patients that have gone through rads to the head that can be excellerated due to radiation damage to the pituitary and hypothalmus, both key in the production of testosterone. Your symptoms actually speak more to that issue then the TSH levels...unless you feel very cold all of the time as well.

Cognitive function, fatigue, motivation, moods, libido, even aches and pains are all symptoms of andropause. You can ask your Dr about getting your testosterone levels checked. The "normal" range in men is between 260 nanograms/decalitre to 1200 ng/dl although 260 is really low. If you get tested and run low there are treatment options for you, testosterone replacement therapy is one option that you can talk to your Dr about.

There are natural/supplemental ways to help enhance "T" levels as well if you don't want to do the replacement therapy route. Either way though it does sound like a imbalance issue so I'd look into thyroid, adrenals or testosterone.

Good luck

Eric