Help with missing website!

Hi,
I have a multisite:
main: localhost/website
other multisite: localhost/website/a

and I worked mostly on the other multisite until I decided to change the url of the other multisite. All the harm has been done, and after changing the url back to what it originally was, I cannot find the contents of the other multisite anymore!!!

Whenever I go to localhost/website/a, I immediately go to localhost/website instead. I desperately need help either retrieving the original localhost/website/a or at least retrieving the contents such as the code I used in CSS/Javascript editor plugins.
Please help!
Thanks:D