I m 28 years old and have chronic anxiety disorder. I know it may seem silly for me to ask the question that I am asking because rapid heartbeat is symptom of panic attacks. But this time, I was just laying on the couch, relaxing and my heart started to pound and beat fast (104 bpm) When I stood up, I felt light headed and my heart rate when up even more. I checked my blood pressure and it is normal. I did use my inhaler earlier in the evening, but that was hours ago and this is still going on. Anyone have any answers, please!