Pray for an end to my throat symptoms

I am an eighteen year old girl who is struggling deeply with secret, unexplainable throat symptoms. I have had them almost nonstop for nearly two years. The symptoms include pressure, coughing, even gagging and vomiting. The one doctor I asked about them simply dismissed them without internally examining me. I feel like I’m going to lose my mind unless God takes away these symptoms, and I’m scared that I might have undiagnosed terminal cancer.