Help me with my dream?

About two years ago I had a dream me and my best friend grace were walking down the street I don't know were we were walking to but we started to notice a man following us so we walked faster and he walked faster then we were running and he was running and he pulled out a gun and shot my best friend I looked back but kept running I saw her lying on the sidewalk dead but the man was still chasing me so I ran still and he fired his gun and shot me it was kinda in slow motion I heard the gun shot npice and felt the impact and then woke up also no one talked the whole dream and I have no prove but I think a week later I learned she had died not from being shot though and that feeling of a bullet going through my heart was the feeling I got when I found out and I think I had the dream the day before she died I have had dreams like this before cause I have baby snail and I dreamt 3 times that they where escaping out of the tank and just about 2 weeks ago they did start escaping and I wanna know if I subconsciously new my best friend was gonna die or if it's just a crazy coincidence.