I know I suffer from health anxiety as much as i hate to admit as I am sure at the time it is some terminal illness. But for the last couple of days i have been having these weird waves coming over me. It feels as if it is coming from the back of my head and I think this is it i'm going to die sometimes I even start to burn up with it. Also I have noticed it happening when I talk to people it feels as if they are talking yet my mind is off and I struggle to stay with them as this dread comes on me again.This can be quite embarrassing as they must think my one word answers are rude but all I feel in my head that i'm going to pass out right here right now. Can this really be panic or is it a brain tumor or bleed that the doctors keep missing. Please help.