It has been an extremely frustrating few months.  I have chronic dizziness and have lost consciousness.  In October I was hospitalized for 3 days while doctors ran tests and tried to get my blood pressure back up, which went down to 70/40.   Probably was one of the scariest things I've ever been through because I was conscious, but I had an out of body experience and my vision went staticky and whole team of doctors rushed in to my room.  All of my bloodwork comes out great and everything appears good with all of my vital organs, yet everyday I experience horrible dizziness and extreme exhaustion.  Some days I can hardly walk.  I can't play with my son or drive.  The only thing the doctors can figure out is that everytime I stand, my heart rate jumps clear up but everything else is just fine.  I've been doing some research and came across something called POTS, postural orthostatic tachycardia syndrome.  They keep doing the same tests over and over and over again and I'm getting very frustrated when there is a possible answer right in front of them, but they won't test me for it.  I'm getting increasingly depressed because I can't live life normally.  It has started causing problems in marriage because my husband is so worried and overwhelmed.  I've been told by the doctors to avoid exercise and standing for long periods.  So far there is no diagnosis, but just a theory that my heart rate when I stand is the culprit.  My legs and hands also turn this splotchy purple color and get really tingly, but when I lay down it goes away.  It just sucks.