I don't want to divulge too much information, but I've been where you are now and gone through the whole process. More than once!
If God wants you as a priest, you're gong to be a priest. At 16 now, you have a lot of time to discern where you thnk you should be.
Don't put yourself through a lot of anguish over this, but instead pray everyday, and ask the Lord for His help on this question. Wait expectantly, but go on with your life. Have confidence that your answer will come.