Wont let me log back in

I love tha app but I have tried every email and password I know and I have tried many versions of my username but it wont let me Back in it keeps saying its wrong when thats the only emails I know so please fix it because I am getting very angry because it wont let me back in and about 3 other people have tried to get me back in my account and it didnt work for them either.

Jaycepenny12345 about Pokémon GO, v1.29.1