Thank you for your question! I understand your concern; but before you worry about heart problems I would recommend you an ECG at rest; a physical examination by your GP and the routine laboratory check-up blood tests (comprising a complete blood count to exclude anemia or inflammation, fasting glucose, liver and renal function tests; also CK-MB enzyme); in your situation you are a young lady without prior personal or familial cardiac history; and excluding risk factors for coronary disease by a normal physical examination (no systemic arterial hypertension) and blood tests (no diabetes, dyslipidemia, etc) would impose you to a very low probability state of heaving a heart attack; after all if ECG and CK-MB test are normal I would recommend you to consult a neurologist because your complains at that point could suggest possible neurological problems like epilepsy or cerebro-vascular disorders,etc. I hope that my explanation could be of help and some relief for you; I wish you the best health welfare; by Dr Iliri