404 Error website has disappeared please help

Someone please help me. I was having a problem with the .htaccess file https://bit.ly/b1VVkP (to see what I was doing) and along the line I deleted a file that I shouldnt of. While trying to figure this out I renamed several file and I think I deleted what I thought was a readme.txt from one of the folders. Now the error message that I had with DBManager is gone but all of the pages that I created except for my homepage is giving me a 404 error… PLEASE HELP!!! I dont know what to do and I have spent hundreds of hour on this project.