Hi..new to the site. I've been waiting a long time after positive RNP antibody test and lots of clinical issues to get to Rheum. One more week and I'm there. Today I got results on a second RNP that is negative. I have a weak RF, negative ANA and negative for pretty much all else except seizures that have plagued me for years. I have very tender fingers, one shoulder and one hip with tendonitis and bursitis. Fatigue of course that comes and goes. Any experience with antibody tests being positive then turning negative? Thank you! Thanks! Ceejay