Do you actually have them? If you don't have symptoms I 'd just be really careful about washing sheets and hands and stuff.
We got rid of pinworms here by eating lots of raw carrots with homemade garlic onion dip (raw garlic, sauteed onions, and salt in dripped yogurt) and garlicky roasted pumpkin seeds. My DSs munched on these all day for a couple of weeks and the worms were not evident after a couple of days and never came back.
I've heard that grapefruit seed extract will kill 'em too.