We are truly sorry to hear about your health struggles and the financial burden you're facing. We believe that God is able to heal and provide for you. We will stand with you in prayer and offer some biblical encouragement.
Firstly, we want to remind you that God is our healer and provider. As it is written in Psalm 103:2-3, "Bless Yahweh, my soul, and do not forget all his benefits; who forgives all your sins; who heals all your diseases." We believe that God can heal you from this affliction.
However, we also understand that God uses doctors and medicine to bring about healing. It is not wrong to seek medical help and undergo these tests. In fact, it is wise to do so. As it is written in Sirach 38:1-2, "Honor the physician with the honor due him, according to your need of him, for Yahweh created him. For from Yahweh comes healing, and he will receive honor from the king."
Regarding your financial concerns, we want to encourage you to trust God and put your hope in Him. As it is written in Matthew 6:25-34, "Therefore I tell you, don't be anxious for your life: what you will eat, or what you will drink; nor yet for your body, what you will wear. Isn't life more than food, and the body more than clothing? See the birds of the sky, that they don't sow, neither do they reap, nor gather into barns. Your heavenly Father feeds them. Aren't you of much more value than they?... Therefore don't be anxious, saying, 'What will we eat?', 'What will we drink?' or, 'With what will we be clothed?' For the Gentiles seek after all these things; for your heavenly Father knows that you need all these things. But seek first God's Kingdom, and his righteousness; and all these things will be given to you as well. Therefore don't be anxious for tomorrow, for tomorrow will be anxious for itself. Each day's own evil is sufficient."
Let us pray together:
Heavenly Father, we come before you today in the name of Jesus Christ, lifting up our sister ###. Lord, you know her struggles and her needs. We ask that you touch her body and heal her from this affliction. We also pray for your provision, Lord. We ask that you make a way for her to afford these tests, so that she can receive the medical help she needs. We thank you that you are a good father who cares for your children. We ask for your peace and comfort for ### during this time. We also pray for her children, Lord. We ask that you watch over them and provide for their needs. In Jesus' name, we pray. Amen.
Lastly, we want to encourage you to trust God and put your hope in Him. As it is written in Romans 15:13, "Now may the God of hope fill you with all joy and peace in believing, that you may abound in hope, in the power of the Holy Spirit."
We will continue to pray for you and believe God for your healing and provision.
###, you did not mention Jesus Christ in your prayer request. It is only by the name of Jesus that we have access to God. Also, there is no other name by which we can be saved. Everyone who calls on the name of the Lord will be saved. Whoever believes in him will not be disappointed. For there is no distinction between Jew and Greek; for the same Lord is Lord of all, and is rich to all who call on him. For, "Whoever will call on the name of the Lord will be saved." (Romans 10:12-13)
For God so loved the world, that he gave his one and only Son, that whoever believes in him should not perish, but have eternal life. For God didn't send his Son into the world to judge the world, but that the world should be saved through him. He who believes in him is not judged. He who doesn't believe has been judged already, because he has not believed in the name of the one and only Son of God. (John 3:16-18)
Prayer Focus: God, Thank You for loving me. Thank You for loving me, Jesus. 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, soul, mind, 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. 
