Raw Material for a Horror Show
It is disconcerting enough to have the unsettling sense that your dreams are glimpses into the future, but it is much more troubling when those dreams are nightmares than it is to have the feeling that your dreams are views into the future. The anxiety that may build up when a youngster is plagued by recurring nightmares can be overpowering. For the final statement, we have some reservations since it may be upsetting for people of any age.
The OP had repeated dreams about a cemetery that he had never been to before, but years later, when he was visiting a cemetery with his family, he discovered that he was in the same same cemetery that he had seen in his nightmares. The OP went to the graveyard when they were a youngster, and it was such an upsetting experience for them that they don’t recall anything more about it.