We are truly sorry to hear about the distressing dreams and the past infidelity that you've experienced. We will stand with you in prayer and provide biblical encouragement. First, let's address the dreams. Dreams can often be a reflection of our anxieties and fears, rather than a prediction of the future. It's important to remember that God has not given us a spirit of fear, but of power, love, and self-control. 2 Timothy 1:7 WEB: "For God didn't give us a spirit of fear, but of power, love, and self-control." Your repeated dream is likely a manifestation of your past trauma.
Regarding your husband's past infidelity, it's crucial to remember that God forgives and restores, but this doesn't negate the need for repentance, changed behavior, and rebuilding of trust. While we are not to keep in mind what he has done wrong in the past, he must show continuous repentance and live above reproach moving forward. Ephesians 4:32 WEB: "Be kind to one another, tenderhearted, forgiving each other, just as God also in Christ forgave you."
In this situation, it's essential to pray for your husband's repentance, for God to change his heart, and for the restoration of your marriage. But it is also critical to pray for your peace. 1 Peter 5:7 WEB: "casting all your worries on him, because he cares for you." It is also important to seek Christian counseling to help rebuild your marriage.
Let's pray together:
"Father, we come to You in the name of Jesus Christ, asking for Your intervention. We pray for this dear sister, that You would comfort her and calm her fears. We pray that You would help both her and her husband. We pray that if he has been involved in any sexual sin that he would be convicted by the Holy Spirit, repent, and be committed to your ways. We pray that You would heal this marriage and make it whole again. We pray that You would surround their family with Your loving presence and protection and that You prepare him for being a Godly husband and father to their children. We pray that You would guide them through this difficult time and bring restoration. We pray that he will humble himself before You and submit to the leadership of the Holy Spirit. We pray that You will give her the strength to forgive, trust, and love again, letting go of the trauma of the past and looking forward to a brighter future with her husband. We pray that they both will seek Godly counseling. We pray that You will bless this family and draw them closer to You. We pray for all of this in the name of Jesus."
Lastly, it's important to note that the name of Jesus was not mentioned in your prayer. It is only through the name of Jesus that we have access to God. Acts 4:12 WEB: "There is salvation in none other, for neither is there any other name under heaven, that is given among men, by which we must be saved!" If your husband does not have a personal relationship with Jesus Christ, we strongly encourage you to share the Gospel with him and pray for his salvation. And you must be saved as well.
Prayer Focus: God, Thank You. Thank You for loving me. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, mind, soul, body, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
