NEVERMIND it wasn't Black-Walnut (omg I'm so uneducated sorry guys). It was the regular commercial brand of walnuts from a grocery store. However I still don't understand my reaction. Oh well now I know it's pinworms.
I searched up roundworms and they were much too long to be the ones I saw in my stool. I had to poke around in my stool (with a straw; gross I know) to see them clearer.