Bad coincidence. The first time I read Pet Sematary from cover to cover while I was in Thailand in 2000, I found out that my guinea pig thousands of miles away had died. The second time I read Pet Sematary in Thailand, immediately upon my return to Vancouver following that trip I found out that the younger brother of a pair of siblings, a younger brother and an older sister, had died tragically. I knew these people for years.
I read Pet Sematary a few times before that when I lived in Western Canada, but do not remember anything bad happening.