In the evenings my heart starts pounding so hard all over my entire body. I feel weak, my veins distend (enlarge) and I know when I stand up blood will pool in the distended veins and the tachycardia will be severe. Does anyone else have this pounding all over? Also, when I lay down to go bed, the pounding is even worse. I can feel my heart pounding in my feet and hands for example, and my feet and hands turn red and hot. Sometimes I have to put ice packs on them just so I can fall asleep. Has anyone else experienced anything like this? Or does anyone know what this is? Also, does anyone wake up BURNING hot (but not sweating) or FREEZING cold during the night?