Stuck in bootloop after flashing ROM
You've gotten yourself in a pretty bad state. Always, always, ALWAYS do a full backup if you plan to change anything at the phones system!

Which ROM have you tried to flash? Re-check, if it is specifically for your device and a stable build. If it's not, flash the latest stable build for your device instead. If that doesn't work, you could try to flash a different ROM - but without Backup and Recovery I don't know much more you could do.