Your rheumy can take a blood test called ANA and find out what you actually have, if it turns up positive, if not you may have to deal with your symptoms until it does show up positive and they know what you have. I've had Sjogren's for some time before my ANA Test came out positive...they thought at first that it was Lupus and I think they still think it will go into it, but it hasn't yet and I'm keep a positive attitude that it won't! Good luck.