Very Painful Throat For Over A Week. Along With Laryngitis.

Very painful throat for over a week. along with laryngitis. Hurts to swallow. Seems to move around .I just got over bronchitis last month. Hey fever for over 50 years. I am 77 years old and took allergy shots off and on during that time. I have been living in Florida for the last five years with no problems till now. Am afraid it could be cancer. What are the symptoms of throat cancer?