Sorry, just reading your reply! Medium is a lot to keep up with sometimes. I'd say worst comes to worst you could unlist the piece so that you can still have it for yourself. I've unlisted a couple pieces on Medium.

I wouldn't really think that it's necessary, though. If you were careful enought to publish this under a pseudonym and use all fake names, I think that you've done your due dilligence here. I loved the piece personally and would be sad to see it go. I'm truly honored you'd respect my opinion enough to ask!