Hihi dr, I am from Singapore ...I have been facing this horrible feeling for almost a year, I wake up everyday feeling dizzy and unable to focus on anything I do including work...and worst of all I feel tightness in my chest and shortness of breath...and most of the time I will feel a lump or something stuck in the middle of my throat and my left arm numb, chest pain, and this few days I feel air in my lower left tummy...I have gone for all kinds ofnfull body checkup...all my results came back perfect.. Even went for a scope for my tummy and doc say is acid reflux.. So what is this that I am feeling everyday? I really miss my old life... I even quit smoking because of all this but I don't find it getting any better