For a very long time now, I’ve had a fast, pounding heartbeat. When ever I lay down to try to sleep, I can feel it twitching erratically in my chest. I experience shortness of breath, and during the day, I get extreme fatigue. The fatigue is to the point that it makes it very difficult for me to function sometimes. I have pretty consistent numbness in my right leg, and sometimes in my left arm and hand. I will also get episodes of numbness all over my body. On top of that, I get left chest pain every couple of days or so. When I’m feeling very fatigued, I get this weird pressure in my head, and in conjunction with that pressure, I feel dizzy. It’s not a dizzy feeling like I’m going to fall over, but more like I feel very “out of it” and disoriented. Does anyone have any idea what’s going on? I went to a cardiologist, and he said I was ok (although I don’t totally trust him). I’m a 24 year-old female. I’m very scared. Any input helps.