Prophets do not always bring positive prosperous words. By the baptism of the Holy Spirit we have the power to live according to His Holy Word. If you are lead by the Spirit you will not be under the law. Ask God and He will freely give the Holy Spirit.
The gifts of the spirit speaks life into somebody. Prophecy brings somethings to life. All of the gifts are about building up the house. Judge every prophecy and the prophet.
Do not uninformed about the gifts of the spirit. If you are born again you are qualified for all the gifts to want and desire. The primary purpose is to point the lost to Jesus Christ.