Exclamation [Q] Help ASAP! Might have bricked Galaxy S3

Hey I'm pretty new to rooting, and I think I might have seriously f'd this one up.

I actually did the root just fine, no troubles with that. I just ran something called saferoot, verified the root and actually made a backup with Titanium (on my PC now). After that, I used an app EZ-Unlock which told me my bootloader was successfully unlocked.

Now comes the rough part. I got ROM Manager and used it to install ClockWork Mod. I hit "Make backup with CWM" it shut down my phone, and now I can't get it to boot at all.

I could really use some help ASAP here, I need the phone. Thanks guys