Hi Louise, yeah it happens. Sometimes it changes because of your medicines. I have never had my ANA go neg. but it has droped from 2560 to 1280. There are also people here that have NEVER had a possitive ANA and still have been diagnoised with lupus.
Now as for the rheumy tell you that you have fibro simply because he /she has no real explination sounds to me that you might want a different rhummy. Not all rhummy's are made the same.
Try not to get to stressed though. This is the dog gone most frustrating disease. I don't even think it knows what it's doing half the time.