PTSD can be such a rough go.
My brain connects me having an elevated heart rate with threat of death, and I’m guessing my heart rate was pretty high during my car wreck. I’ve previously had the experience of having a panic attack during or after a workout (why I haven’t worked out much beyond yoga and walking since my wreck), but today I was helping move a safe (pretty heavy object) up a staircase and it triggered a panic attack. Not during, thankfully, I tend to be pretty task-focused, but after I had to drop to a crouch to get close to the floor in case I passed out. I breathed on purpose, acknowledged to myself what had happened and how I felt (I also had an ankle and a foot smashed, and I think my feet tend to be pretty sensitive to injury), shook it off and went on with my day.