Welcome to our family. I see that you've already been given some good information from some of our members and I hope that they were helpful to you. I am in total agreement with Tadpole about the ANA issue. It is very possible to have Lupus with a negative ANA (just as it is possible to have a positive ANA an not have Lupus). Also, as Tadpole mentioned, the ANA is only ONE of several tests ( those that she listed) that must be run in order to diagnose Lupus. The result of the ANA should not be used to dismiss or diagnose Lupus.
Here is a website about ANA-NEGATIVE LUPUS that perhaps you can print and take with you to the doctor.
Basically, if your ANA is negative and you are displaying symptoms of Lupus, the doctor is supposed to run tests to check the following - not simply dismiss the possibility:
1) High titer anti-double stranded DNA antibody
2) Anti-Sm (Smith) antibody
3) Biopsy-proven kidney disease
4) Biopsy-proven skin disease
Also, keeping a diary/journal of your symptoms is a very good idea as Mountaindreamer suggested and I also agree that you might consider asking for a referral to a rheumatologist.
In the meantime, please know that we truly understand what you are going through and we are here to help you as much as we can.
Peace and Blessings
Look For The Good and Praise It!