I had a positive ana, double stranded dna, and I believe smith's antibodies. I also had a butterfly rash at the time. Besides lupus, what could it be?

Probably Lupus. A butterfly rash is often seen with lupus, but could also been seen with vitamin deficiency disorders like pellagra or connective tissue disases like dermatomyositis. However, the positive ANA and smith's antibodies most likely indicate it is lupus. You should see your physician to be properly diagnosed.
Not Much. Sounds pretty diagnostic for lupus to me.