Please help me translate the following short letter from Chinese to English! Extremely grateful!

I received your letter just now, knowing that you would take an exam on June 4th. I think you are under a lot of pressure.But please believe in yourself.All you need to do is to adjust your mentality before the exam. It exams not only the knowledge, but psychological quality, that is more important. You just need to do your best, and that is enough. As long as you work hard, you will succeed! Don't let yourself get too nervous and under too much pressure.What's more,you need to have a healthy diet,adequate rest ,plenty of spirit,and a good state of mind to meet the challenge!

Believe in yourself. I will send the most sincerest wishes for you in the distance. Pay will have harvest! Relax the mood to meet the challenge, I believe you.You must be the best! Believe in yourself.You can do it! I will always pray for you ! Merciful god will bless you. Come on, success belongs to you!