THE ART OF NOT PROCRASTINATING:

“Step One: Fight Fear. God doesn’t want you to be afraid. God did not give us a spirit of timidity, but a spirit of power, of love and of self-discipline.(2 Timothy 1:7).
The point is not to be afraid when test time comes.
Step Two: Flunk Failure. God wants you to work hard and do your best, but He doesn’t require you to get straight A’s. Your worth in His eyes doesn’t depend on performance.
Whatever you do, work at it with all your heart, as working for the Lord, not for men, since you know that you will receive an inheritance from the Lord as a reward. It is the Lord Christ you are serving (Colossians 3:23-24).
But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. (Romans 5:8).
If God sacrificed His only Son for you despite all the awful stuff you do, certainly messing up on a test (even though you tried your hardest) won’t bother Him. “

I think surrendering the fear and asking God to live out this verse is more helpful than repressing the feelings.