Default [Q] Could not mount /data ! Phone Stuck!

I flashed a CM based ROM, and decided to get back to Slimkat. Opened my recovery ( Philz CWM ) wiped everything, and now tried to restore my nandroid ! And suddenly Im on Can't mount /sdcard ! I can't even flash a new ROM or do anything, I get stuck on Google's boot logo if I want to get to the ROM.

Let's note that I had no USB debug checked as I was only checking out the newly flashed ROM. So am I literally in a dead situation? Anyone please may help ?
Always switching between ROMS, It turned to a kind of sport after all.