A flashback is something that really happened. Are the voices of your abusers saying things that they may have said in the past or seem like things that they might say? In that case, you are most likely experiencing flashbacks. If something about it starts to seem unreal, it may be a hallucination. For example, maybe the voice is deeper and sounds like a monster. Even then, if the abuser was a part of your childhood, it may still be considered a flashback. Children have a harder time understanding the difference between reality and fantasy, and mental health practitioners can take that into account when forming a diagnosis based on things like this.
Based on what you've said so far, it doesn't seem like psychosis. However, you don't need to be afraid if it is. Psychosis can occur with a variety of mental health conditions and is treatable.
