As much as I'd be sadden by the fact that a gift of prophecy is nothing more than something that applies to only one's personal life and not to the world as a whole (nor even to other Christians beyond you and your immediate family), I'll give you the benefit of the doubt.
Ever since I took about 27 million of those spiritual gift quizzes back in junior high and high school, I never put much stock into trying to determine my "spiritual gift" as much as just determining what I can do for God as I am and letting Him work through me as He will. (plus, I was too melancholy about getting the highest score in discernment of all things. Great, now I can tell people when they are being fooled by bad guys not of God, how exciting, everyone will
loooove me. :\ Why couldn't I get the gift of teaching or helps like everyone else? /my teen self)
Someone more learned in this type of stuff could give you a more straightforward answer probably, but I'm fairly certain you won't get very far trying to convince people you're some sort of prophet. I mean, if you are, God will let us know, and if not, you need to re-evaluate your focus in life back on God and not on dreams or prophesying.
Basically, instead of asking us if having dreams that happen to come true = prophesying, ask God about it.
EDIT: Oh, to be a bit more helpful, here's a reference that talks a bit about spiritual gifts and whatnot in Romans 12 (specifically verse 6)
http://www.biblegateway.com/passage/?se ... ersion=NIV