I can't believe no one else addressed the fact that the OP expressed that before all this happened to her, she had a deep phobia of worms.
I'm starting to sense that a lot of people here thinking they have parasites are also victims of phobias, a real and serious health issue, and that would explain perfectly well why so many have expressed that all their tests come back negative and why no treatments for parasites ever seem to work.
Not saying this is what's happening with all here who think they have parasites but their test all come back negative, but probably more than people realize.