Oh the panic button on the key fob, that is probably it! My kids 'tried it out' a few months ago. I didn't realize the Last Alarm means the reason for the car alarm to go off.Does your car know about the coronavirus because I'm panicking, lol. Seriously though, could someone have hit the panic button on one of the fobs?
Ever since watching Goldfinger I've wanted an ejection seat triggered by the panic button 😉.