Your honest cry has been heard and I want to answer it with care and prayer. You are carrying a very heavy load, caring for your grandmother who is bedridden, worried because you moved her and heard her neck make a sound, feeling responsible for her weakness, while also caring for your mother who experiences the world differently, and trying to support your father and your brother and his family. On top of that your own body is struggling with kidney and drainage problems, you are not caring for yourself well, you are exhausted and you do not know how to make things better. It is understandable that you feel empty and are asking Jesus for mercy and for a miracle.
Please do not stay alone with the guilt you feel about your grandmother's neck. When we love someone deeply, any accident, even a small one, can bring a flood of guilt, and we start to think if only I had been more careful this would not have happened. That sense of guilt is very common for caregivers, especially when someone is fragile. Scripture shows that mercy means not receiving what we deserve, while justice means receiving what we deserve. In Psalm 51 David cried out for mercy when he could not hide his guilt from himself or from God. He found that nothing removes that heavy sense of guilt like confessing openly to God and receiving His cleansing and forgiveness. Jesus took our guilt and our sin upon Himself when He died on the cross and paid the penalty for it. No human effort can fully erase that haunting feeling, but trusting Him and receiving His forgiveness can. If you are blaming yourself for what happened, bring that specific moment to the Lord, ask Him to forgive any failure, and receive His mercy. He does not want you trapped in a cycle of guilt and self punishment. He wants to lift that burden and give you joy and gladness again.
You also said you are running on empty and so tired. That is a sign of burnout, and it comes quickly when we try to carry more than God intends for us to carry alone. Jesus said His yoke is easy and His burden is light, and that He delights to do the will of the Father. That does not mean the work is never hard, but it means we are not meant to do it in our own strength without help, rest, and support. Caring for a bedridden loved one, supporting a parent, and managing your own health at the same time is more than one person can sustain without help. Needing help is not failure. It is wisdom to invite others to share the load, whether that is family, trusted friends, a church community, or medical professionals. Caring for yourself, getting proper rest, food, and medical attention, is part of being able to care for others.
I do believe God heals, and I believe strongly that healing takes many forms. The Scriptures show Jesus healing in different ways. Sometimes He healed instantly with a touch, sometimes with only a word from a distance, sometimes He told someone to go home and they found the healing had taken place, and in one case the healing was gradual. There is much about healing we do not fully understand, including why some are healed quickly and others are not. Even the apostle Paul prayed three times for his thorn in the flesh to be removed and God chose not to remove it but to give grace in it. So we cannot presume to dictate how God must act, but we can confidently bring every need to Him. Matthew connects the prophecy of Isaiah, surely He has borne our infirmities and carried our sicknesses, to the physical healings Jesus did, and when we remember communion we remember His body broken for us. That shows His suffering was for our spiritual and physical restoration. Any healing process is divine, because God created our bodies and the natural processes within them that bring recovery. He also brings healing to our minds and emotions, healing the wounds and scars inside even as He works in our bodies. He is not limited to one pattern and He has power in the physical realm and the spiritual realm.
Because of this, we will pray for your grandmother's neck and her weakness, for your mother, for your own kidneys and drainage issues, and for strength for your father and your brother and his family, trusting God to work whether instantly, gradually, or through the skilled care He has provided. At the same time, please seek prompt medical evaluation for your grandmother's neck to make sure she is safe, and seek medical care for your own kidney and drainage concerns. God often brings healing through doctors and through the natural healing processes He designed, and that is still His divine work.
Let us pray together. Lord Jesus Christ, have mercy on this dear one and on this family. You see the exhaustion and the love that has been poured out in caregiving. Forgive and wash away the guilt and fear, and lift that heavy burden. We ask You to lay Your hand upon the grandmother, to protect her neck and body, to strengthen her where she is weak, and to bring healing according to Your will and Your way. Touch the kidneys and the drainage problems, bring restoration and guidance to proper care. Give wisdom to find help and support so this caregiver is not alone. Provide rest, refreshment, and daily strength, and let Your easy yoke be felt. We also lift up the mother, the father, the brother and his family, asking for Your protection, peace, and provision over each one. We trust You with what we do not understand, and we ask for Your mercy, Your healing, and Your sustaining grace. Amen.