endocrinologists? For your thyroid.
http://www.aace.com/resources/memsearch.php
Just click on the blue above...
I've the opposite problem and you need a truly skilled diagnostician who can take into consideration your head injuries and sort out which is causing what problems...then, ideally? GET HELP.
Another good resource is: http://www.endocrineweb.com/thyroid.html
It's short, sweet and not too much blather or run-arounds.
I keep going back to this site often as it reviews all the 'glands', fascinating they are, truly. And when just one malfunctions? Watch out!
There are other sites as well, but some tend to 'tout' particular types of treatments and/or 'cures'. We are all different.
Do a search here about 'hypothyroid' using the blue bar above. It'll show you all posts that mention it and something there might click with you.
Having one of the two is bad enough, but TWO? Sort of fries the brain, doesn't it?
Do let us know how you get to answers as you go along. It can be frustrating and then even more so as tests and diagnoses/misdiagnoses abound. But stick to your guns and get the best diagnosis you can!
's - j