[Q] Need help with my phone, constant crashing topic

This morning my OnePlus randomly started giving me crashes "com.android.systemui has stopped"
I reformatted my phone and reinstalled the CMod 11S, then it started giving me "AudioFX has stopped working" constantly. I then tried to flash the nightly ROM, and now it's giving me the same "com.android.systemui has stopped" error.
I now have no custom recovery, all of my data is gone and the phone won't even mount to USB storage.

I'd REALLY appreciate it if someone could help!!!