also have to add after years of therapy and attacks you may be more ok and less fearful when they happen (whole point of panic attack therapy). fear of the fear is the fuel. If you are not as concerned they lessen a great deal. You say you learned to stop trying to understand why; that is a lot like most who get through as in saying they don't care as they know they will live and no longer fear it will kill them.

Trying to know why does not always stop the panic, not caring does. Understanding and exploring does help the nightmares, ibs, chronic pain, insomnia, palpitations... so on. it does help with a wide array of symptoms.