Need help getting rid of worms

Any advice/help would be greatly appreciated.

I just discovered a large roundworm in my stool a few days ago.

I was having an itchy bottom for a while and decided to take Mebendazole and do the Paragone program. I've also been taking oil of oregano and goldenseal echinacea.

I'm getting some sensation throughout my body and I'm afraid some may have left the digestive system and moved around.

What other things can I do to get rid of them?
Thanks