Abby,
I think I may have mentioned this in a post awhile back, but if you're thinking myositis please visit the Myositis Association website for patient information and for the discussion board. Look at the Community Forum under the Community tab. Polymyositis, dermatomyositis and inclusion body myositis affect different people in different ways. Some have pain (lots of pain) and some have very little, so don't let that be your guiding factor. Most, but not all, have elevated CK levels. The muscle biopsy is the gold standard for diagnosis. I'd give you the website but I'm not allowed to post that here yet. The folks on the discussion board there are a very caring, supportive and well-informed group.
Athena