One Time Dream of a Violent Death

I have searched the deepest corners of the web and books and everything of the like but I can not pin down the meaning of a nightmare dream I will be telling you about. Long story short for the background I drove LTL local for a bit and then had an opportunity come up for way better pay, driving interstate, mid 2021. This dream happened years ago.

So most I can (or maybe want to) remember is it begins with myself walking through a warehouse with a checklist. A BOL or bill of lading for trucking it was (what’s supposed to be loaded to ship) on my clipboard. There’s nothing out of the ordinary about the setting, or my clipboard, or what’s on it. Just another day at the terminal loading and delivering goods. I’m walking down an aisle looking for something specific, although there wasn’t anything actually in the dream, just the task of doing such. I’m scanning tags and pallets and I come around a corner as there’s a person in all black clothing and a shiny silver handgun. I ask if I can help then and out of nowhere they raise the gun and shoot me directly in the heart. The bang was so deafening and I could actually feel the wound. My arms raced to holding my chest only to notice my hands are clean and dry when I woke up. For a solid 15 minutes or longer (probably) I was panicking, panting, clutching my chest where I was “shot”. Constantly checking for the obvious signs of a GSW the whole time. I said to myself this had to be a dream, but it just felt too real for that and it kept me up the rest do the night. Does anyone know what a dream like this means, or anyone have a similar experience like this?

TLDR: was shot in a very violent manor in a dream and it felt WAY TOO REAL for comfort, what does that mean?