Your symptoms can be consistent with anxiety/panic episodes, especially with recurrent racing heartbeat, chest discomfort and fear of a heart problem. A normal ECG and routine tests are reassuring, but persistent symptoms still deserve proper evaluation
Next Steps
Correct
vitamin B12/D deficiency, reduce caffeine, maintain regular sleep and consider counselling/CBT for anxiety. If palpitations are frequent, your doctor may consider ECG monitoring
Health Tips
You can consult me with your reports and symptom details for a proper assessment and personalised treatment plan.