The weight of what you are carrying comes through very clearly, even in few words. To be so furious at injustice that tears will not come, to feel beside yourself and not know how to handle it, is a heavy burden, and God sees it. You asked for help in the name of Jesus, and that is the right place to turn, for there is no other name by which we are saved and heard.
You mentioned speaking too soon to a doctor who you thought would have no reason to be envious, and now you are facing the sting of that. Scripture and experience teach that envy does not follow reason. It is a dreadful and pernicious passion, like a venom seated in the soul, and it harms the one who harbors it far more than the one it targets. It does not need a logical cause. As with Abel and Joseph, envy can rise even where there seems to be no ground for it, because its root is not in what you have done but in vainglory, love of honor, and covetousness in the heart of the other. Do not be surprised that it appeared where you did not expect it.
That same passion now presses on you in another form, as fury and a sense of injustice. Great vigor of soul is needed to hold out against such a violent blast. When we are wronged, the temptation is either to be lifted up in anger or to be cast down as if buried alive. Both come from valuing too highly the things of this life, honor, reputation, outcome, vindication. If a person steals money or hinders our good name, he cannot steal the treasure that is above, and he cannot take away the honor that comes from God. That treasure remains secure when our heart is set on Christ. The one who does injustice first destroys himself, while the one who suffers it, if he remains with God, receives no lasting loss but rather gain.
So cut off the root where you can. Learn to despise in the right sense the passing things of this earth, not with bitterness but with a clear eye that they are not your true life. The lowly heart, delivered from love of glory and from envy and jealousy, finds rest even when others are troubled. Ask God to keep you from letting anger take root in you, for anger and envy are kin, and both trouble the soul like a worm in mire.
Bring this very fury to God honestly in prayer, as you have begun to do. Do not let the sun go down while nursing it, but lay it before the Lord who judges justly and who will in time make all things right. Guard your tongue going forward, committing your plans quietly to God before speaking of them widely, not out of fear but out of wisdom. Seek one or two faithful and mature believers to counsel you in person about the practical steps with this doctor and whatever was to transpire, so you are not alone in deciding what to do. And ask for grace to forgive, not because the wrong was small, but because you have been forgiven much in Christ and because forgiveness frees your own heart from the poison of resentment.
Let me pray for you now.
Heavenly Father, you see this child of yours who is furious and wounded by injustice and who does not know how to handle it. You know what was spoken and what has followed. Have mercy and bring peace where there is turmoil. Guard this heart from being overwhelmed by anger, and keep it from envy and bitterness. Give wisdom to know what to say and what to leave silent, and what steps to take next. Let justice be done according to your will, and let your name be honored in the outcome. Above all, keep this soul anchored in Christ, in whom alone is salvation, and remind this one that the treasure laid up in heaven cannot be stolen. Comfort, strengthen, and guide, in the name of Jesus Christ our Lord. Amen.
Keep bringing this to the Lord day by day, stay in His Word, and do not walk through it alone. If the fury remains very strong or you feel unable to cope, please reach out promptly to a trusted pastor or counselor in your church for personal care and support.