Alicia,
Welcome to the club. Mine crashed about a year ago; tried various doses of synthetic T4 and it wasn' t working so I started on Armour (which contains T3 and T4) about 2 months ago, TSH is almost normal now and I feel stronger every day. I was creeped about the source of it as well, but DANG, I can't be a couch potato the rest of my life. The results have been AMAZING. Hope the extra weight falls off soon; at least I have energy to be physical again after a year of dreading every flight of stairs etc. Nothing works right when the thyroid is wack; be kind and patient with yourself and know that you will feel better.
I suspect the "normal" ranges for TSH may need to be tuned up, b/c based on what I've learned in the last year about Hashimoto's and all things thyroid, I believe mine was acting up as much as 5-6 years ago but TSH levels showed normal until last fall. In my research and speaking with a variety of health care pros, there seems to be some agreement that the norms need revising. For whatever that might be worth.
And with all due deference to Skunk, it couldn't hurt to try going gluten free or reducing it for a while, then reintroducing it to your diet and see what happens. I went GF for months, and then gradually added back. I am now able to tolerate small amounts of it but if I have too much, I'm wrecked for the rest of the day, just miserable. I don't know if it has anything to do with the thyroid or not, I just know a lot of people have gluten issues, and if you're one of those, it would help you feel better to avoid/reduce. The tough bit is, it is REALLY hard to avoid gluten in modern life, but there are folks around town who can help. Gwynn at La Loba makes GF goodies and FTHOI sells a number of GF products that I use. Rice cakes are my new daily bread, LOL.
I have been advised to steer clear of soy protein as it is bad for the thyroid. There's a fancy word for that but I don't remember it at the moment. Some people say stay away from brassicas for the same reason, but my doc said eat LOTS of raw broccoli sprouts and other brassicas every day, the benefits of the antioxidants and sulfur compounds far outweigh whatever harm may come from chowing down on cruciferous veggies. Chandra can grow some REALLY tasty brocco sprouts, very fresh and crisp. I like mine on a rice cake with some hummus, maybe a slice of tomato, and hot sauce.
My doc also told me I'm not allowed to be vegetarian, I must have some high quality (organic free range etc.) meat protein most every day. I don't quite understand the reasoning, but some of it was for iron (beef) and something else had to do with tendency of thyroid folks to have trouble fully digesting other proteins. Wish I could be more specific on that. I can say I've had a weak digestive system as long as I can remember, and now wonder how much of that was tied up with goofy thyroid.
If you get into hormone testing, I'm told the all-day saliva test is the one to use, not the blood tests and not the one-shot saliva test. Not fun, but gives the most accurate assessment throughout the 24-hour cycle. Or so I'm told. When everything crashed, my cortisol, for instance, was all over the map from morning till night, opposite of how it should have been (too low in a.m. and too high in evening) so if we'd only taken one reading at one point in the day, we would not have known that.
Hope some of this helps!