it suddenly died,no warning signs, and wont start.
“Won’t start” or won’t crank? I’m no mechanic but more information will help someone who is figure out what’s wrong. My top of the head guess is a failed alternator but again that’s just a wild guess.
Needs a tow to a mechanic who can diagnose the problem.
That is the best I can suggest based on the 9 words you posted about your problem.
As aaa would say, are you in a safe place?