[Q] Failed Cyanogen install, now phone won't boot topic

I unlocked the bootloader with no problem and loaded Clockworkmod custom recovery without a hitch. When I downloaded the nightly of CM11, it failed halfway through installation. I tried using other builds and two different custom recoveries. Open recovery didn't fail, but the phone just stayed at the blue CyanogenMod screen and never booted.

Now, I have no idea what to do, and I don't know how to just return to stock. I honestly rooted just so I could WiFi tether in infrastructure mode, and now I can't even make a phone call. What can I do?