Okay well I saw that you are just starting out and that’s completely fine.
I think this could be really fascinating story for sure, but with something as painful as getting shot in the head can be described in so much detail. You have the structure to describe this fully and you do a little but not enough to serve this proper justice.
The sentences are sort of awkward to read through. Kind of seemed choppy to me, like it just jumped from one idea to the next.
Read through this again sometime in the future and you may be able to take this and make it completely more descriptive and visual for someone to see.

It does need work, but the point of this site is to keep developing as a writer! so try again with this and I promise it will make the world of a difference! :)

Dreams don’t always make sense. Your narrative is an exploratory and slightly confused way anyone might try to make sense of a weird bad dream. It rings true. Makes me think you really had this dream and wanted to write it out. Did you?

Yes, I had this dream and I’m still confused by it!

It is short and could use a bit more fleshing out, but it stands pretty well as it is. The possibility of the bullet in the mouth has some interesting symbolism to it, though I don’t have enough background to venture an interpretation.

Grammar-wise you’re missing some commas in your compound sentences. At first I thought they were run-ons, but they work fine.