I had a panic attack alone in my car. what can i do to get through it on my own?

Panic attack: Panic attacks often happen in enclosed spaces. open windows, or turn air conditioning on, turn on music, breathe deeply.

Panic: Breath in slowly & deeply through your nostrils. Fill your lungs with air (but not to the point of discomfort). Hold for a count of five then slowly begin to exhale through an open mouth. Repeat at least 12 times, longer if you need to. If you haven't been assessed for your panic/ anxiety - that would be prudent. Anxiety is no fun BUT it is treatable.