nightmare

I had a nightmare last night. Scariest dream ever last night where I was the only living person in my family. Now panicking cause of it!My older siblings were shopping, mom had just called them Than my mom told me that they had been pushed off the road by a snow plow.They were dead. Mom and Dad went after them and the same thing happened to them.I woke up in middle of the night, crying.  I've been Googling premonitions since then and appearantly it was a premonition! And the dream was during a blizzard! that's the weather here today! I'm scared. What if my nightmare comes true?