Sounds like you're worried about your future? Aren't you graduating? Here you've been studying all this time, putting your eggs into an advanced basket. I believe dreams are usually to balance/show us opposite sides to our waking, conscious selves. If you are really confident of something, they will remind you of the "other" side so you'll "balance" out and not get too extreme in one direction. Doesn't mean that will happen but the possibility is always there and when we get too negative, will show up positive possibilities or that we are consistently too negative and same with positive; as the Arabian proverb says, "All sun makes a desert" :-)