I have been dealing with abnormal blood findings, joint fatigue, dry eyes, mouth and enlarged parotid gland and horrible fatigue and brain fog off and on since 2001.  Sometimes ANA normal sometimes it is 1:320 usually homogenous first time speckled.  C reactive protein always high sed rate always normal.  Now my RF factor was 95 but jus found out my ccp is negative.  I have been taking 5 mg of prednisone for about a week and has helped the brain fog and fatigue still having some joint pain especially in right pinky finger which has developed a little knot on it during the last week. 

All my other tests came back normal this time around.  Could I be dealing with Rheumatoid arthritis or should I just deal with it and give up on diagnosis?