Since the beginning of breakfast this morning, I have had an intermittent fluttery, pulsing movement/twitch just beneath the bottom of my ribcage, slightly to the left. There is no pain, only an uncomfortable sensation. Occasionally, I feel out of breath. This has been continuing for about an hour, now. My pulse seems to be steady and regular, as checked on my left wrist. I am a 50-year old white male, about 185lbs. so I m pretty sure I m not pregnant!