You will have to wait a few months and see if you contracted hiv/aids.
Most people do not become infected from a single exposure to hiv/aids.
It's like playing russian roulette, you can engage in sex many times with a carrier before actually getting blown away. Lupus does not make you more prone to become infected from one expozure.
Because your immune system is already messed up by the lupus, you will require a different drug cocktail, if you ever actually catch it.