After rebooting my Xubuntu 14.04 boots to a blank screen after showing logo .
I Thought it's because of a x.org server so I booted to Grub but there was no "failsafex" and I booted again normally went to the text based form(ctrl alt f1) and made some configurations trying to reinstall xserver but none of it worked and I think I just made it worse because now even it doesn't show the Xubuntu logo and requires a text based login .
I also tried to reinstall the OS by Xubuntu ISO but there was no choice for keeping the files and documents so I cancelled it
what should I do now ?! I have some important documents on some apps and many important bookmarks in chromium so I just can't let it go

(on ivy bridge Intel hd graphics if that helps)