Hi Tinkerbell, as you have only been on 50 mg for four weeks, I would leave it for at least another month before you think about changing the dose/medication. That will give the new dose time to 'bed in' and you will have a better idea of what's what if you decide to introduce T3. Low thyroid hormones can cause muscle and joint pains. I had severe tendonitis for years until I got myself on the right hormones.
Here is a link to an article about dosing:
If you are interested in addressing autoimmunity and inflammation, have you heard of the Paleo Autoimmune Protocol (AIP)? It is a lifestyle program, not just diet, aimed to reduce antibodies. The idea is that it helps heal the immune system and gut mucosa. It is applicable to any inflammatory disease. If you want more information, Paleo Mom, Phoenix Helix and Autoimmune Wellness are good websites. You must be feeling rough if you are unable to prepare your own food properly. The AIP is quite hard at the beginning. I was lucky that my husband did all of the cooking. It does get easier and it is not all about diet. Stress management and sleep hygiene are also important (those are the two hardest factors to tackle in my experience)
Gluten molecules take about 6 months to leave the body. Marks and Spencers do a palatable g.f. bread.