I just discovered this site, and it's been a real comfort. I've just been diagnosed with Afib. It was found accidentally during my Echo ( up until that point I had been suffering from bouts of sinus Tachycardia so.. Surprising!) That and I had always fancied myself to be a fairly healthy 41 year old. All I think I have been feeling, when not tachycardic, is a fluttery chest which makes me want to cough. Is this Afib?? I'm not complaining mind you... Bit it is is VERY irritating, and I can't sleep. I've noticed that if I try to sleep during these periods, I will inevitably wake up with tachycardia. Anyone have similar experiences?