Andrea Hi and Welcome to HW,
I am sorry that you are having to deal with this arthritis is no fun my no means.I have crohns,oa,ra,as and Sejerens as well so I can relate to were you are coming from.
I will try to help you the best I can.Ok RA can come on all the sudden as to were oa is a gradural (sp)thing meaning that you can have oa for along time and not know it because it takes time for it to show up and time before it makes you start having pain from it.
I my self Have oa in my left ankle and my left knee infact I'm fixin to have replacement soon.
Have you been put on any meds?I noted to where you are waiting to get Remicade.Remicade is a good drug and it has helped alot of people to be able to get there life back sorta speak,but please remember that every one reacts different ley to meds.
Please let us know how the test comes back and please know that you are welcome any time.