Place in This World...

So. This song has been going through my head a lot recently. I think that in my case, it's more my place in the world of ministry that's up for grabs, so to speak. I'm discerning, and praying...I know I am called, and I have a niggling feeling to WHAT sort of ministry I am called, but part of me is very scared to take that leap of faith. What if I'm wrong? What if it doesn't pay off? Am I being genuinely cautious and discerning. or do I not have enough faith in God?