Cause and Effect

Looking back on my original story, I started to think about cause and effect and how that relates to me. I thought about when we stopped at the shop in the stain to get a drink, that was the cause and the effect was that we were about 30 seconds late to get the train that got bombed. I personally think it is chance, as in it was purely luck that we did that, however it did make me think is it God? Was there some sort of sense that told us to go to the shop. I do believe that if my Dad and I were meant to die that day we would have.