I forgot my instagram username but I don't use my old phone anymore?

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So, I forgot my instagram username, and I tried the forgot your password/username thing and it sends an email to whatever email my account is tied to or whatever. But I can't remember the password for that email (because I had to set up another yahoo email so I could make this instagram so I never get on it) and I did the Forgot your password thing on that, but it sends a text to my old phone that I no longer have, and I have a different number. & they do have a link thing that you can click that says something like "Can't get to your phone?" and I clicked that and it just goes to a blank page and says untitled in the link box. I can't ask a friend to look at it because it was this anon account that I had that no one knew I had. I already looked through an account I remember following on my anon, but they have like 130k followers so...yeah.
- Can't remember my username
- Can't get remember my email password
- Don't have the same phone

so what do I do?