I hope it makes you feel better to know that I feel the same way. I am in treatment and hope to feel better soon. It is a horrible way to live. Obviously as said by KillPanic, there is no shame in how you feel. Obviously we cannot control it and it is not a choice. Who would choose these feelings? I would prefer to have a physical problem over a mental problem. The mind and brain are very complex. Its amazing how thoughts can control your physical body causing panic and anxiety. Certain medications have helped me and some have done nothing at all.
Your topic says "Anxiety but dont feel I am anxious." I think you are wrong about that. You say you feel like you are going to die. If thats not causing anxiety then I would say thats a problem. Of course you feel anxious about the thoughts of dying and getting other physical symptoms. You are seeking help and opinions on this Board so clearly you are anxious. Call a therapist and start getting help. I have read many times that Anxiety has never killed anyone. However it certainly destroys your quality of life. In my case it currently is very bad and see a psychologist 2 times a week. Good Luck and Keep Posting!!!