Please search and read other posts about pinworms. It definitely sounds as though you have them especially since you had some improvement with the Reese's Pinworm meds.
The big part of pinworms is the hygiene. You have to wash your underwear, pajamas and bedding every day. You have to clean your toilet with alcohol, also your tub.
So read the posts about pinworms. There is a wealth of information on this site.
One more tip: if you can, heat your house to 95 degrees as it may help kill some of the eggs that may be infesting your house. Vacuum like a madman as you can find eggs in the dust bunnies.
And treat your sex partners too. People can have infestations without symptoms. Treat everyone in your household.