Who has had a panic attack like mine?

Yes, I had them when I was young. I didn't have that feeling of imminent death, as lots of others do...but it was more of a trapped feeling. Like I had to get out, run, get away...the discomfort always made me cry and I felt like an idiot because I couldn't pin down what it was that triggered it. But yes, a very frightened feeling and a sense of being helpless. You're not alone by any means. I'm glad they have improved for you. I don't have them anymore at all.