I Am An Artist, And I Was Working On A

I am an artist, and I was working on a large piece in June / July and my wrist began having problems. My wrist still has issues, but also my elbow. My shoulder was already bad to begin with, and arthritis runs heavily in my family. I have a type of it in my legs and I'm worried it's in my wrist or shoulder. I'd like to find out what I could do to find out if I do, and what would help it because I need my wrist to heal as it is part of my profession.