Hi and welcome to WHL!
First thing that you need to do is try to calm down. There is NO test for Lupus so having the Lupus antibody does not mean that you have the disease. (breathing better?) Actually, it would make many of our lives easier if there were!
To get a Lupus diagnosis a lot of things need to be going on that they can not find any other answers for. You can look here to get the criteria for diagnosing the disease. If you don't feel bad (except for the disc) then don't stress over it. Most of us complain for years of different things before we can get someone to diagnose us. One positive Lupus antibody test most likely doesn't mean anything.