If you stood before the Lord and He said "go"..... Would you go? Maybe he is already calling you to a new task, ministry or lifestyle change. Maybe the fire of the lord is burning right before you but you are saying... Who me? Why me? Not me! Perhaps you need to surrender like Moses to a task that far exceeds your abilities so God can display his power through your weakness.
Stop worrying about your abilities and start seeking the Lord for the wisdom and strength you will need for the calling. Be sure you pray for humility, for you will need it!