I sometimes get fluttering in chest. A bit of pain near left armpit. Today I experienced fluttering below left nipple and somewhere above ribs. I am frightened with these events. I am already very concerned and anxious about heart problems. Recently i took ecg and trop t. Trop t was negative. Echo and tmt were done 3 months back and were normal too. Every second this fear is there in my mind and don't let me do daily life tasks. Today morning i was sleeping on my stomach and i felt some fluttering. And thn j couldn't sleep. Right now i have ran for 1 km and did it without any difficulty. Please help and guide that what to do. I am attaching the reports too.