I have had Atrial Fibrillation and a low heat rate for years now and often have these feelings. Not pain but feelings that something isn’t right and that I am about to pass away. You could have something similar and if it is then it is down to your heart rate fluctuating. My doctor told me if you are going to have a heart condition this is the best one to have. Get yourself checked out and I wish you all the best xLast night I had some sort of episode. I woke up with a deep feeling of unease that I wouldn’t see morning. I laid on my back and it was like something passed through me and I sat up with a start. I asked my husband to phone an ambulance and got out of bed. I have never felt so ill in my life. I felt so bad that I told my husband that I thought I was going to die and told him I loved him. It was terrifying.
Unfortunately our local hospital was at capacity for walk ins and we were in a queue for an ambulance. My husband drove me to another hospital further away. I was still suffering with chest pain and palpitations. All I could think is that I was going to die on a country road in the middle of the night and my husband would have no support.
So yes, unless it’s swift and sudden, the thought of death does scare me, and I used to be a nurse !