Hi, I would advise you to relax and take it easy. Since your multiple ECG and Echo are normal, it excludes any cardiac ailment. Continuously thinking about disease makes us ill. It’s a constant stress which will give rise to anxiety , panic attacks , acidity , bad sleep , depression and it’s a viscous cycle. Please cut the cycle. Believe in yourself and believe in god. Follow a routine and healthy lifestyle and food habits. Find time family, sports. Give yourself a goal and try to achieve it Meditate Avoid caffeine especially at night Sleep for 6-8 hrs