I just read this from Seth Godin...
If you're waiting for a boss or an editor or a college to tell you that you do good work, you're handing over too much power to someone who doesn't care nearly as much as you do.
We spend a lot of time organizing and then waiting for the system to pick us, approve of us and give us permission to do our work.
There's a difference between achieving your goals and realizing your work matters.
If you have a book to write, write it. If you want to record an album, record it. No need to wait for someone in a cubicle halfway across the country to decide if you're worthy.
Our validation doesn't come from others, it comes from our relationship with our heavenly Father through Jesus Christ. Everyone of us has been called and gifted by Him "to be apostles, some to be prophets, some to be evangelists, and some to be pastors and teachers, to equip God's people for works of service." (Eph 4:11-12)
Don't wait for someone else to validate your call or your gifting. It's already been done. You have the power of the Holy Spirit within you. You have the power and authority to do what it is that God has called you to do, so don't wait, listen to God and obey.
I believe in you, but more importantly, God does.