You are in my prayer:
Hail Mary, full of grace.
The Lord is with thee.
Blessed art thou among women,
and blessed is the fruit of thy womb,
Jesus.
Holy Mary, Mother of God,
pray for us sinners,
now and at the hour of our death.
Amen.
and also these:
Prayer for Chastity by St. Thomas Aquinas
Dearest Jesus! I know well that every perfect gift,
and above all others that of chastity, depends upon the most
powerful assistance of Your providence, and that without You
a creature can do nothing. Therefore, I pray that You defend, with Your grace, the gift of chastity and purity in my soul as well as in my body.
And if I have ever received through my senses any impression
that could stain my chastity and purity, I ask You, who are the Supreme Lord of all my powers, to take it from me, so that I may with a clean heart advance in Your love and service, offering myself chaste all the days of my life on the most pure altar of Your divinity. Amen.
The last two prayers from:
saint-mike.org/spcdc/swprayers/default.asp
Prayer To Control Thoughts
In the name of the Lord Jesus Christ, strengthened by the intercession of the Immaculate Virgin Mary, Mother of God, of Blessed Michael the Archangel, of the Blessed Apostles Peter and Paul, and all the Saints and Angels of Heaven, and powerful in the holy authority of His Name, I reject this thought and feeling of [list for describe thought/feeling] which is contrary to God’s will. I choose only thoughts in harmony with the Holy Spirit, and I cover my thought life with the blood of the Lord Jesus Christ. Amen.
Rebuking Particular Spirits
In the name of the Lord Jesus Christ, strengthened by the intercession of the Immaculate Virgin Mary, Mother of God, of Blessed Michael the Archangel, of the Blessed Apostles Peter and Paul, and all the Saints and Angels of Heaven, and powerful in the holy authority of His name, I ask of the heavenly Father to rebuke this spirit of [list the attribute of the spirit such as fear, lust, depression, etc] and to command it in the name of the Lord Jesus Christ to depart from me, now, quietly, without harm to anyone.
I bring the power and the protection of the blood of our Lord Jesus Christ over my life. Satan has no part with me as I am sealed with the saving blood of the Lord Jesus Christ.
Heavenly Father, forgive me for not being all I should be in Your eyes. Let the cleansing, healing waters of my baptism wash over this me and cleanse me from all unrighteousness.
Lord Jesus Christ, fill me with Your [list the opposite attribute of the offending spirit; if fear, then list peace, if lust, the list purity, if depression, then list joy, etc] to replace the [list again the attribute of the spirit such as fear, lust, depression, etc] .
Lord Jesus, bring to bear my guardian angel, and all the angels of heaven, against the forces of evil that seek to cause trouble for me.
Saint Michael, be my protection against the wickedness and snares of the devil. Blessed Virgin Mary, Mother of God, and our Mother, pray for me that I may not fall into the devil’s temptations.
Thank You, Heavenly Father, for setting me free. I praise You, I bless You, I worship You. Thank You for the wisdom and light of the Holy Spirit.
Thank You for enabling me to be aggressive against the works of the enemy. Thank You for Your hope, that takes away discouragement; thank You for ongoing victory. “…in all these things we are more than conquerors through Him who loved us” (Romans 8:37). Amen.
Tony