Oh how I wish someone would send some real doctors out to this island! I've been going down this road for years, and got the same tired old story: "your TSH numbers are fine...your thyroid is fine, go away". From my GP, Endo, OB/Gyn. Probably friggin Santa Claus, too. But there is a shortage of doctors here, and one just can't go to another doctor; none are taking new patients.
And like many, I have all those symptoms; I'm more active now than I have been since I was 17, I eat less (and better) than anytime in my life, and still can't lose weight or feel better. I too know there is something weird going on in my body, but.....
And yes, I did print out some thyroid facts to take to my doctors to attempt to have a meaningful discussion. Well! I was treated like something unpleasant they stepped in out in the back forty. That "who do you think you are with all that fancy information?" attitude. We are doctors, you are one of the great unwashed.
Ack. That turned into a rant....I'm so sorry. I do wish you luck is getting to the bottom of your weight gain! Please do as the other ladies have suggested: hammer away until you get answers. The squeaky wheel gets the grease. But not around here.
Best wishes and {{{{{Meaux}}}}} to you!

Let us know how it goes.