Hi Oats, I've had severe rheumatoid arthritis in my large joints for 3 years. I'm 22. I have found that diet truly is the most powerful way to alter your disease, equalling the power of drugs. I also take Enbrel, which I get no side effects (that I'm aware of) from, and it works great. Methotrexate made me feel awful and didn't help at all. However, even after enbrel and dietary changes and supplements and herbs, I'm still suffering. But I am sure that if I were on a standard American diet, I would be close to dead right now, no exaggeration.
Things I have eliminated that were seriously exacerbating my inflammation: SUGAR, wheat, all meat except fish, all dairy, oats (sorry

), eggs, soy, tomatoes, potatoes, any type of grain-flour, even if it's gluten free, fried things, citrus, most processed foods.
Things that are big staples of my diet: FISH, NUTS, VEGGIES, almond butter, tahini, bee pollen, berries, hummus, kale, other raw/whole veggies and fruits.
Consider yourself lucky to have pain only in your knee (so far, i guess). I have it in all 12 major joints.
Also, I wonder if weed would work for me. I do know that psychedelics actually reduce inflammation for me. If only I could have a Peyote button for breakfast every morning. Sigh. I should get on that. I don't do weed because it causes social anxiety for me. K, hope this helps.