I Have been feeling lethargic about 3 weeks now i have tachycardia  with near syncopy and these episodes have been increasing I usually become very lethargic feeling before an episode and the lethergy will go away  shortly after the episode but this lethargic feel is now not going away. I was having chest pain last week also with SOA  But it would ease off with rest. I was wondering what or why this is going on.
Thanks for your question on Chat Doctor. I can understand your concern. Chest pain, lethargy, shortness of breath, tachycardia etc. are characteristic symptoms of heart diseases. So better to consult doctor and get done ECG and 2d echo. If both these are normal then no need to worry about heart diseases. Sometimes anemia (low hemoglobin) and hypothyroidism can also cause similar symptoms. So get done thyroid function test (TSH, Free T3 and free T4) and hemoglobin estimation.Don't worry, with appropriate treatment, you will be alright. But first diagnose your self and then start appropriate treatment. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.