I heard a brother speak this last Sunday on Philippians chapter 3 about "the goal and the prize." It was perhaps the best, most practical speaking I've heard on this matter of rewards and potential loss thereof.
Not a fear thing, but an encouragement thing! I thought to post this video link as it may be helpful to others - it was to me!
Let us run the race, forgetting what's behind and stretching forward to pursue Christ with the other runners with us!
Pursuing for the Prize!