Dream About Family Dying 6

I had a dream a year ago about my family dying one by one, first was my mother who died on her death bed at a hospital due to unknown cancer or disease, then was my little brother who died from unknown reason and I don't actually have a little brother, next my little sister died from unknown reason and I don't actually have a little sister, last was my big brother who died from getting run over by a train and I actuallydo have a big brother, and the last thing I remember was being in a school that I don't know of and I was afraid that I might br the next one. Me and my family cried everyone time someone died.