I tested positive for lupus anticoagulant when i was pregnant but do not now. my brother has as and my son is + for hlab27. should i get tested again?

Different things: The + hal b-27 not related to lupus anticoagulant(la). The la needs to confirmed, especially if you have a history of clinical problems related to the la like blood clots in the legs, emboli to the lung, strokes, misscarriages, etc. Depending on the clinical picture you may need therapy - many only Aspirin for its anticlotting ability or stronger blood thinners.

Yes: It would be prudent to get tested again and consult a hematologist. Wish you good health.