I often feel dizzy, faint, short winded, and my chest gets tight after standing for not that long, maybe 5 minutes. Also after walking up stairs or even jogging to the kitchen I feel as if I can t take a deep breath. I also have moments where my chest gets extremely right and I have to lay down, but once I lay down my entire body feels heavy and I don t feel better until I eat something sweet. Can someone please explain.