so i have been using multirom and reflashed a rom to my internal rom. then i rebooted it and it is stick with a blank screen after the "google" logo and stuck there. when i go to twrp, it prompts me for a password that i have not set. I have read that this happens if you dont reboot after unlocking but i did that when i first unlocked the bootloader and have never ran into any problems flashing many roms till now. any ideas???