Hello ma am thanks for your question and detailed medical history sudden onset palpitations at rest needs to be evaluated thoroughly by a cardiologist it could be due to a heart problem or low sugar i would like further information to guide you better like Your blood pressure recording History of sweating or chest pain in my opinion you must consult a cardiologist immediately for examination and investigation like ECG stress test and blood Profile like as hemoglobin blood sugar and cardiac markers hope this helps you please feel free to ask me a direct question for more assistance wishing you good health