In 2008, I had surgery to remove my thyroid due to overactive nodules that caused tachycardia 24/7. I have not had any tachy since, until about 8 months ago. I was diagnosed with Lupus last year, and I'm not sure if it is related, but I wake up with my chest/torso fluttering/shaking. It kind of feels like tachycardia, but a little different. I usually feel a bit lightheaded at the same time. It seems to happen most often when I'm lying down. Does this sound familiar to anyone?