Sometimes, though especially in the morning, if I am standing up by the sink or something, like getting some water, I can feel my pulse start rising. I do sometimes have postural hypotension, so I do sit on the edge of the bed for awhile watching tv before I get up. It happened again this morning, though I could tell my pulse was a little faster when I first got up this morning and I was doing a few things. When I went to get a drink of water, it just started pounding. Don't know if this is postural hypotension or if I shot some adrenaline because I was getting scared. I sat down for awhile and it slowed down. I know this happened standing in line at the grocery store too, but I think that is mostly panic attack. Now I have to get ready to go to work and I'm afraid that it will happen again or happen at work.