Thank you for visiting the family practice forum.
The test you are referring to is a assay which indicates the presence of antiphospholipid antibodies (anticardiolipin). Elevations of the anticardiolipin antibody can be associated with arterial or venous thrombosis, low platelet counts. I suspect you also have the presence of an elevated partial thromboplastin time (PTT) which puts you at increased risk for bleeding.
Put simply, the elevated anticardiolipin antibody means you are at increased risk for cirulatory problems and/or bleeding. It means your lupus is "active" and you need medical treatment. It is up to your doctor to decide if you need to be in the hospital but I can tell you, based on the elevated anticardiolipin antibody and the clincial symptoms you describe you NEED to be treated.
Predinsone and anti-malarial medications such as Plaquenil are common treatments for Lupus exacerbations. There are other immunosupressive medications to consider however and if you do not tolerate the plaquenil perhaps you should speak to your doctor about the use of immunosupressive agents such as cyclophosphamide or azathioprine.
When lupus in uncontrolled or you are having an "exacerbation" you body is essentially making antibodies against itself, therefore the mainstay of treatment remains "calming down" your immune system so your body literally stops attacking itself.
I hope you find this helpful.