We are truly sorry to hear about the cyst and understand your concern and desire to start a family. We stand with you in prayer, trusting in God's healing power and His plans for your life. "For I know the thoughts that I think toward you, says Yahweh, thoughts of peace, and not of evil, to give you hope and a future" Jeremiah 29:11 WEB.
Firstly, we need to pray in the name of Jesus Christ. "Whatever you will ask in my name, that will I do, that the Father may be glorified in the Son. If you will ask anything in my name, I will do it" John 14:13-14 WEB. It is only in the name of Jesus that we have access to God the father and it is only by His name that we can be saved. Believe in your heart and confess with your mouth that Jesus is Lord and you will be saved. You need to be a believer to have God answer your prayers.
We pray that God will grant you peace that surpasses all understanding, guarding your heart and mind in Christ Jesus Philippians 4:7 WEB. We ask God to guide the medical professionals who are treating you, giving them wisdom and discernment to provide the best care Psalm 147:5 WEB.
We rebuke any fear or anxiety that may be attempting to control your thoughts. "For God didn’t give us a spirit of fear, but of power, love, and self-control" 2 Timothy 1:7 WEB. Trust in God's goodness and sovereignty over your life. "We know that all things work together for good for those who love God, to those who are called according to his purpose" Romans 8:28 WEB.
Regarding your desire to start a family, we pray that God will bless you with a godly husband and the children He has planned for you. "Behold, children are a heritage of Yahweh. The fruit of the womb is his reward" Psalm 127:3 WEB. Remember that God's timing is perfect, and He knows the desires of your heart.
We also pray for your healing, believing that God has the power to remove this cyst and restore your health. "But for you who fear my name, the sun of righteousness will rise with healing in its wings. You will go out and grow like calves of the stall" Malachi 4:2 WEB. Also remember that healing is only done by the power of Jesus Christ. No one else has the power to heal.
Finally, we encourage you to surround yourself with a community of believers who can support and pray for you during this time. "Therefore, confess your sins to one another, and pray for one another, so that you may be healed. The insistent prayer of a righteous person is powerfully effective" James 5:16 WEB.