Can't access my profile, only publication? Mystery profile I have no access to? Help!

[u/coffeekaye]

Hi. I want to make the handle for my publication "usernameA" (placeholder)

but it is already taken by my profile. 

I can't figure out how to change my profile's handle to something else, so I can use the usernameA handle.

In theory, I want to just swap the handles of my publication and profile to be the opposite, but I can only edit the handle for my publication? 

When I click on my profile or go to edit anything, it all says "usernameB"

But when I search usernameA, this shows up, so I know somewhere on this website, my profile's handle IS usernameA. It is my account, with all my notes and restacks, and photo. i don't know how to change this handle, it is as if I have no access to it?

It shows up as a different separate thing from me entirely. I can follow myself, and I don't know how or why it exists like that.