I am a 26 year old male...don't exercise much, I work forty hours a week. About a year ago, I had been taking caffeine pills for four months...I was taking more than was supposed to. I started having palpitations, and severe shortness of breath. Now, I feel like I have to burp a lot, but cant,..still get shortness of breath and palpitations. I don't know if this is a digestive problem or not, but it seems to get worse after eating. My doctor has done numerous tests, and he thinks that I have anxiety disorder, but every medication that I have been on has not helped me, and I feel like I am going to die....SOMEBODY PLEASE HELP ME....I AM SCARED TERRIBLY!!!!!!!!!!!!!!!!!!!!!