I agree with Lorica that you may not only have pinworm, although a systemic pinworm infection is very difficult to get rid of. Dr. Bailey at Humaworm says that for strongyloides and systemic pinworm, you should alternate the herbal and pharma protocols, so they don't get used to one. She said do the pharma, then the herbal, then the pharma at 3 month intervals, and eventually, they will be under control. She told me that it may take several treatments to start really seeing results, because they lay 10,000 eggs a day per female, so it takes awhile to get them all...or most of them.
Don't give up. After this round of pharma drugs take either Humaworm or Clarkia to give your body a rest and make sure they don't get used to the drugs.