Do you think you may have RA?
Just remember, not everyone who has a positive RF factor has RA, and not everyone who has RA has a positive Rheumatoid factor (blood test).
A BETTER indicator of whether or not you have the auto-immune disease rheumatoid arthritis is a blood test called the Anti-CCP.
If your doctor hasn't checked this then go back and have it checked!
Also, if read the story of "my first symptoms"... it may give you a better idea of the symptoms you can experience with RA.
Good luck :)