It all depends on the dream itself really. If it was about someone or something that means something to you, then it is not uncommon to remember the said dream. The fact that dreams have meaning is purely a myth, however, it is true that most dreams are a result of our subconscious (according to psychoanalysis). Maybe it is something that is worrying or troubling you, or is simply on your mind? If this is true, then it could be the reason why you remembered the said dream almost 2 days later, however, it is not always the case.