I dreamed that my girlfriend fell from a tall building.

It may be a dream or a harbinger of the outcome of something. But one thing, you won't really fall from the upstairs. What is it depends on whether you have anything recently, such as personnel struggle, love competition, exam evaluation and so on.

I had many dreams, and they all came true.

You don't have to worry too much: although some dreams hint at the direction of things, they are often not as terrible as dreams, some are temporary, and the results of stages are not final.

If you really face something, you can tell me (the general situation, needless to elaborate, or explain what it is), and I will tell you my previous dream, which will enlighten you.