Because you have a history of autoimmune diseases in your family, I definitely think you should ask to have blood tests to check for RA and other conditions. Especially of all they have done is take x-rays. While you may have degenerative disc disease, you may also have another condition. Be persistent. If you feel that you have something else going on make them test to prove you do not. I was initially dx'd with fibro but it did not feel right. A year and a different doctor later I walked away with a list of things wrong and not one of them was FMS. Don't be afraid to get a second (or third or fourth) opinion if you think your doctor is not interested in pursuing this further. Please let us know what you find out!