Most doctors do not believe rope worms are a real thing. I believe rope worms are real, as I've had them myself, but I'm not even convinced they are actual worms. They could be fungal or mucous, I don't know... What I do know is that if you ask a doctor about them you are going to some strange looks.
If you really want to see a doctor about this, you should explain your symptoms, but don't use the words 'parasite' or 'worm' . If you have a specimen, take a good photo of it to show to the doctor. They do not want to see the actual worm, but should be ok looking at a photo of it.