Stupid me..forgot my username

Hi, I have just upload WP on to my hosting sever and all went ok and it installed, so I then followed the tutorial on this site and changed my username and password for my login to wp instead of the usual “admin” and the email sent pw. But I must of misspelled it I think, because I can remember the UN and PW i would have used (I have three I always use). Now when I go to my blog and try to login to my admin I I’m shutout.

I have went to my ftp and downloaded all my wp files to open them with my text editor but I don’t know if I can find my password and username within these files? If I can where do I look.

Thanks for the help in advance and your patience:-)