It may not be easy to do this, but realize that the priest is “standing in the place of Christ”. Think of that in the Confessional - that you are confessing to the Lord Jesus, through this priest. The faculty of offering this sacrament to the people of God in the name of Christ ought to be humbly received by the priest and humbly administered to you, for the good of all. Thus it can be a healing and joyful experience for all involved. So relax, and trust God.