The future and coping with PA

Hi all, I have been diagnosed now for 8 years, I started initially with Psoriasis which was quite mild in my early 20's, however I started experiencing pain in my left ring finger shortly after my daughter was born which spread into the majority of my fingers within a short space of time, after trying sulfasalazine and experiencing negative side affects I was given Methotrexate which worked brilliant, it also pretty much cleared my Psoriasis too. Last year I had a car accident and suffered a life threatening injury resulting in a stroke, after this it seems that my body has rejected the methotrexate and the PA has progressed to the majority of my joints, I have been taking Arcoxia and Co-codamol to deal with the pain, however it barely takes the edge off. I now take 7.5mg of Methotrexate, plus the pain relief, however flare ups are happening quite often and result in me needing an injection to manage, at my next Rheum appointment I'm hoping they consider me for the injections which you administer yourself. Any additional pain I experience I put it down to the PA, recently this has occurred quite severely in both shoulders which makes it difficult to sleep as I am a side sleeper, also the ball of my foot and one toe which looks like it is fractured. I never thought that at 43 I would end up in so much pain when I started with this 8 years ago, I worry about the future and how much worse this will get. Has anyone experienced their PA spreading throughout their joints like I have? Does anyone else suffer with their shoulders and feet/toes? Also has anyone tried the 'inject yourself' pain relief? Your feedback would be greatly received, many thanks Sarah.