Default HELP! bootlooping cm11, pc wont recognise fastboot!

with unlocked bootloader, i installed cwm, downloaded cm11 through romtoolbox and installed zip from recovery.
im now stuck on boot screen and have been for 24 hours, when i connect to pc to reflash stock image(didnt back up), i get 3 low pitch dongs and pc cannot find the device(waiting for device).
i have the sdk, adb and fastboot, motorola device manager etc all installed, tried multiple usb cables but still no luck
can anyone help?