Based on your symptoms (sudden palpitations, fear/panic, overthinking) and normal ECG and
lipid profile, this is most consistent with anxiety/panic disorder with benign palpitations rather than heart disease. Such palpitations are common and not dangerous when cardiac tests are normal.
Next Steps
1. Get
thyroid profile (
TSH) and Hb,
electrolytes if not done.
2. Consider 24-hour Holter monitoring only if palpitations persist or are very frequent.
3. Start non-drug measures first (see tips below).
4. If symptoms continue, consult a physician/psychiatrist for short-term medication.