Lottie,
you're not alone in this. I had pretty severe RA flare after my husband completed treatement, and am still dealing with mobility issues from it. I have ongoing stress, fear and anxiety issues that impact my daily life and my horseback riding. I'm kind of a mess. But, on the the other hand, my husband and I are both muddling along, and are still pretty active for our age. Exercise helps, meditation would help too if I would do it.
Best wishes - and try to take a walk in the spring sunshine if you can!
Maria