I have a similar problem but I think it's even worse.
I lost an account called manu5ll. I had great Minecraft mods there. I'll explain how I lost that account: basically one day when I open Curseforge it says that I needed to login so I tried with the username and the password I remembered for twitch and it didn't work. I tried to change the password by writing my email and my curseforge/twitch username but it says that there doesn't exist an account with an email and a username like that. I then clicked "forgot username" and now I've received an email saying that my username is "manu738". When I created this "manu738" account there wasn't any of my mods of my manu5ll account (I had 80k downloads!).