Nicholas Batzig, a PCA pastor, has written an encouraging post on overcoming discouragement in ministry. He lists seven strategies to repair and renew our spirits for service, including the importance of remembering our call to the pastorate:
In 2 Tim. 1:18 [Paul] told Timothy, “For this reason I remind you to fan into flame the gift of God, which is in you through the laying on of my hands.” Remembering that God has set us apart to pastor His people helps fan the flame of our zeal for ministry. This is essential for ministers to remember when the discouragements come in ministry. Knowing that God has called you into ministry enables you to keep going when things get tough.
Check it out. I pray God refreshes you through it.