why are there always recurring dreams about me being shot?

Well a few months ago i had this dream that i was home alone and there was this guy outside with a huge gun and there were people all over but none of them tried to stop him or call the police or anything. So i hid in the closet and right when he came into the room i was in, i woke up . then a few weeks later i had ANOTHER dream kind of like that. I was home alone cooking something on he stove when i seen a guy outside the window with a gun, there were cars all around the house and yet none of them were trying to stop him. Then that's all i remember. I never told anyone about that. Then just last week my sister had a dream that i was home alone and there were a bunch of shooters on the loose around where we live and right before they found me she woke up. Then just a few days ago my brothers friend was telling my brother about how he had a dream that he and my brother were outside playing catch while i was in the house alone and our neighbor came over and got out his gun and came in the house and tried to shoot me but him and my brother beat him up...

I just thouyht it was wierd that 3 different people had dreams about me being shot. Im 14 girl.... yep we live in the country side of WI so its not like we live in. the ghetto or anythcing.