Take heart, all your files are probably safe on your hard drive! At worse you’ll just have to get help getting to it.
BTW I looked up at Dell and they suggest:
“ If the error happens during the startup process, try booting to the Last Known Good Configuration. “
I don’t know if you’ve ever gotten that option.
Good luck.
I get NO options when I turn on the computer. If I try to boot in safe mode, it ignores that command and loads up the BSOD