For about 2 weeks now every once in a while I'll feel like a "thump" in my upper chest, kind of by my throat. Then it feels like my heart beats a little bit harder then normal for a few seconds. I'm having no other symptoms. I do have anxiety and am used to chest pains/tightness/muscle tightness/etc. I had a EKG around 1 1/2 or 2 years ago and everything was normal. I heard that if something is wrong with your heart, it takes a while to happen. Anybody else ever have this? I'm very anxious about it, and I dont think thats helping at all. Thanks :)