Is it SCARY?

This story is about my dream. When I was middle school student, I dreamed. In the dream, a dog chased me terribly. Actually, I don't like a dog because when i was young, in the countryside, a dog chased me really. At that time, I was too young and scared, so I don't like dog after that. How wired the dream was! In real, I am scared a dog even in a dream, I really scared the dog that chasing me. So, in the dream, I tried to call the dog off. FIrst, I run and run for struggling to escape. But the dog is too fast to escape. So, I made a heel. But it also in vain. Then, I awaked from a dream. Is that all? Absolutely, no!
The day after dreamed day, I gained serious gastroenteritis. So, I went down with gastroenteritis, and I couldn't go to school tomorrow and the day after tomorrow. After recovering the pain, my mom told me some thing like a Korean superstition. That is  if the dog appears in a dream, the dog means ghost. If I didn't try call the dog off, I would gain more poinful than gastroenteritis. I felt wired and even I was scared. No matter how it was dreamed, it is wired that I gained a pain after dream. Until now, it is my experience which is about coincidence or not.