Depending on the size of your town/school somewhere between very likely and fairly unlikely? That's ultimately something you're going to have to answer for yourself, I just recommend you be mindful and discerning while doing so. Even things that are quite unlikely will tend to occur given enough opportunities. It's not likely to flip a coin and have it land on heads 10 times in a row, but if I do this 10,000 times, it more than likely will occur at some point. If you're having multiple dreams per night and waiting years for the events of one of them to transpire, that's likely to happen at some point, I think if anything the curious part is that you remembered what sounds like a fairly mundane dream for such a long time until something resembling it occurred. Why do you think that is, and are you certain that you remembered the details of a dream perfectly for two years?