I just had a pain between my left nipple and the center of my chest. After that, it felt like my whole body got warm for about 30 seconds and then I felt ok. I dont know what is going on. Can someone PLEASE explain how heart burn feels? I should tell you, I am a type 2 diabetic,been diagnosed with having Gerd, and IBS.Had my gall bladder removed 2 years ago. And been having lower back pain for the last week. My Doctor does not know what is going on with me. I had a stress test 3 years ago and everything was fine, and multiple EKGS. I have had this going on for about 3 years now. This stuff is driving me CRAZY, Any comments would be greatly appreciated.