I am 37 and have had to episodes of rapid heartbeat,nausa and dizziness out of nowhere. I had to sit down and wasn't sure if I was going to passout or not. This last one has left me feeling like something is in my chest. I also vomited this time too. My husband said I lost all color in my face. I have never had anything like this before. What could it be. I just had a full workup a month ago and was fine.