Tonight I was feeling tired and sligtly nauseated. When I got up, I had such a fast and hard heart beat, I told my husband I had to go to the ER right away. It was so frightening - I thought I was going to have a heart attack. By the time I arrived at the hospital, I felt better but decided to get checked out anyway. I was checked out and am back home now. They said it was palpitations. I am wondering if anyone has had this before. I will see a cardiologist to get myself checked out further.