You had a nerve wracking moment and your nerves were shot add how scary a panic attack can feel, plus how stressful going to the ER is, my heart started racing just reading that. It can be so scary Often panic attacks can come from panicking about panicking and the cycle begins. But There was a real anxious moment that was legitimate and your adrenaline spiked, tgats a natural response .... maybe if you can try to see it that way it can subside the fear of having another panic attack? if it doesn’t subside and this persists and becomes chronic and life altering, i dont see why not try, what if it helps? I tried medication and didn’t help so i stopped and tried therapy which is helping