I hear voices in my head, and have visions too. The visions are playing out future scenarios. They are not always bad.I think of these visions like a movie playing in my head.
I think it should be called daydreams. Everyone has them, just not always scary one's.
I think of the visions as a gift. It sounds like your visions are for the purpose of protecting you. It's good that you are aware of potential danger. The only way I have found to deal with them is to distract myself, or just simply let it play out, but don't dwell on it.
Distractions could be reading, watching tv, or exercising.Well anyway, good luck with dealing with the awful daydreams. Big hugs from over here....