Your request has been heard and I am joining you in prayer for the healing of your tongue, mouth and tonsils and for peace in your soul.
I pray that the Lord in His mercy would calm your heart and bring complete healing to your body for His glory. The ministry of Jesus was marked by preaching and teaching and healing every kind of sickness and disease among the people, and His power to heal has not lessened. I ask Him to touch your tongue and the sides of your tongue, your mouth and your tonsils, to remove any white coating and to let no cancer or tumor be found, and to restore you to health.
I also pray for your fear, because the worry over what might be found can hold a person in bondage through the fear of death. Scripture says that He took on our humanity to deliver those who through fear of death were subject to bondage all their lives. The angel's word to Mary was fear not, for you have found favor with God, and that same assurance belongs to every child of God. You have found favor through Jesus Christ, and you can open your life fully to Him without qualms, trusting that He will do what is right and good. Choose to live by every word that proceeds from the mouth of God, putting your trust in His Word rather than in fearful thoughts.
God has given the tongue great power. Proverbs teaches that the tongue of the wise uses knowledge rightly, that a wholesome tongue is a tree of life, and that the power of the tongue can cut or heal. May God help you to use your mouth to speak what heals and comforts, and may others speak such healing words over you as well. A soft answer turns away wrath and a word spoken at the right time how good it is, and I pray you will hear such good and timely words from the Lord.
Scripture also teaches that when a person speaks in an unknown tongue he speaks not to men but to God, for no one understands him yet in the Spirit he speaks mysteries, and that this builds up the one who prays. In private devotion this can be a blessed and edifying experience, while in the gathering of believers we are to speak words that are easily understood so that all may be built up. Whether with understood words or with groanings that only God comprehends, your spirit can pray to Him and He hears. He understands the mysteries of your heart when you cannot find the right words, and that communion with Him will strengthen you.
I understand your discouragement that symptoms seemed to improve and then returned. Do not take this renewal as a sign that God has withdrawn. Out of the abundance of the heart the mouth speaks, and a good treasure brings forth good things. Continue to confess with your mouth that Jesus Christ is Lord and believe in your heart that God raised Him from the dead. There is coming a day when every tongue will confess that Jesus Christ is Lord to the glory of God the Father, and to confess Him now brings salvation and peace.
So I pray again, Father in the name of Jesus, calm this soul, let Your peace guard heart and mind, heal the tongue, mouth and tonsils completely, let there be no cancer and no tumor, let the white coating be gone, and let this healing be a testimony to Your goodness and power. Strengthen faith to keep trusting You even while waiting, and let every word spoken be for building up and for healing. Amen.