Sometimes, I will feel this intense fluttering sensation in my chest. Sometimes, it is accompanied by a pinching feeling in the left side of my chest, others, it is not. Sometimes, I get the pinching feeling in the left side of my chest without the fluttering. What could this signify. As far as I know, I do not have high blood pressure or anything like that. However, I should note that I am 25, 365lbs, and 6'0". I have no currently existing health conditions that I am aware of aside from the whole obesity thing.