Hi, I was fighting a bad allergy for the last month (stuffy nose, watery eyes, congestion). Two days ago I started hearing a metallic echo when I talk or people talk. I went to the doctor today and I was diagnosed with tinnitus.However, the metallic noise I hear is only when people or I talk. It is not permanent. Is this another kind of Tinnitis? Also, I had a Tetanus shot around 10 days ago. Could this be a side affect? Please, help I am very worry :(