What do you think? Ask yourself that. You can only know the answer truthfully. What does your intuition tell you? What does your inner self say? You can also receive guidance from the god or goddess you work with, your spirit guides, etc.
I would just say this is a nightmare that you had. I could imagine some children having nightmares like these with everything in the news and on the internet. It is not being repetitive or anything. Is it? Some dreams that mean something are dreamt over again or you're simply remembering the dream by worrying about it too much. It all depends. It could just be a sign that something is going to happen in the future; however, that doesn't mean it will be the dream. Perhaps something bad might happen. Dreams can be very symbolic at times. Dreams have represented, predicted, and symbolized many things in many cultures throughout history.
Overall, I view this as a nightmare.
If you are worried then tell an adult! Your parents and counselor can help you as well.