Yes! Pleasee leave a message so he will call you back. Or maybe you can find someone in his office that can help you. Finding out what it is will be soooo much better than this. I feel you on the nervousness.. I'm the same way. I have learned though that it's better just plow into it head on. Like ripping off the bandaid.
"Success is the sum of small efforts, repeated day in and day out." Robert Collier
"One's best success often comes after their greatest disappointments." Henry Ward Beecher
