My initial ECG was doubted to be WPW. I took a echo and TMT test both came out normal. But I feel discomfort in left chest below collar bone and side and ribs and back. I took a ecg recently and it came out normal. I feel sore when i touch some parts of chest and in the center of chest (between right and left). The symptoms started few days after i finished tmt test. Attaching my reports. I am burping a lot too.