It is possible to have the conventional antinuclear antibody tests be negative and still have Lupus. Usually, these patients have skin rashes and little in the way of generalized internal problems. The true number of such cases is obviously unknown. A lot depends on definition, but the agreed figure is probably quite small, 1% to 5% of lupus patients will have negative lab results, particularly negative ANA. So, there are patients who have lupus despite negative tests.
However, it is possible that you could be suffering from one of many auto-immune disorders and doctors will usually test you in a process of elimination (test to see which ones you do not have) before a diagnosis is made. So, until that is done, no one can really tell you what you may or may not have :?
Peace and Blessings
Look For The Good and Praise It!