I had an episode about 2-3 weeks ago, and I m not sure if it is worth following up on. I felt fluttering in my chest, felt faint and sweaty. No shortness of breath or chest pain. The entire episode lasted only about 15-20 seconds, but concerned me. I have felt palpitations before, but never with accompanying symptoms. This had not happened before, and has not happened since. I assumed it was most likely due to caffeine intake, although I had not used more than usual that day. I am an otherwise healthy 40 year old woman.