<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been experiencing irregular heartbeats, shortness of breath and fatigue for a few days now. What do you think might be wrong with me?  <response>: Based on your symptoms, its possible that youre suffering from atrial fibrillation. To confirm this, well need to perform some medical tests. Well need to do a hematologic test, Electrocardiogram, CBC, glucose measurement, electrolytes panel, intravenous fluid replacement, and cardiac enzymes measurement test. Patient: Thank you, doctor. When can I come in for these tests? 