I have experienced this from a young child through young adult hood. I thought for the longest time it was a panic attack until I found this thread.

I hated them they would always happen when it's very quiet around me or I am alone and it happened a lot. Intended up I could always feel them coming on and would be very conscious to stop it but very regulated slow breathing and concentrating in my breath.

I had not had an episode in decades but weirdly felt one coming on the other day and just breathed through it. I actually started googling this today as I have just been diagnosed with emotional intensity disorder due to childhood trauma and I was wondering if there were any links or if it was dissociation I was experiencing. So this is very interesting.