Well, I had yet another appointment with the rheumatologist yesterday and he's finally admitted that my varying symptoms are related. Finally!!! Last time I saw him he was convinced my foot pain was in no way related to my shoulder pain.
He's diagnosed me with Psoriatic Arthritis even though I have no recollection of ever having psoriasis. I'll take his word for it though. Funnily enough, he's given me a choice of medication and given me leaflets for both telling me to think about it before letting my GP know which one I'd prefer. I've been offered Sulphasalazine or Methotrexate. I've looked in to both and am leaning towards the lesser evil seeming side effects of the Sulphasalazine. I'm willing to listen to advice or people's experiences of both though.