I can't tell you what she meant when she said that she hoped you did not have lupus. Perhaps it was related to the fact that lUPUS is a chronic disease that has no cure; that symptoms come and go; that patients deal with relapse and remission; that your life will change with this disease.
The reason that she may want to do more tests in the future is because Lupus does change and, as I stated, symptoms come and go. ANA levels are not constant (they could be borderline on one test; positive three months later and negative after another year!). We all have to have blood tests regularly in order to monitor the activity of the disease. This is necessary in order to determine our treatment, to see if medications need to be modified or new ones added etc.
If all tests are negative, what action is taken will be up to you, your doctor and your symptoms. Unfortunately, with Lupus, there are too many things that cannot be precisely predicted :?
Peace and Blessings
Look For The Good and Praise It!