Default I'm in a boot loop, ADB not working

Hello everyone,
Sorry I'm kind of a noob (obviously since I messed up my phone!). I unlocked my bootloader, installed TWRP, and rooted my phone. Stupidly, I flashed a stock 4.4 rom without doing S-OFF and am in a boot loop now. I was going to flash another ROM but can't get one on my phone. I tried to use TWRP to mount my SD card but, it couldn't mount my SD card. When I tried ADB it says no devices found. I've updated HTC Sync manager and the Android SDK manager but it still hasn't worked! Can you guys give me some help!?