I had long periods especially during stressful time(exam) and my Hb was near 8.one night after waking up for going go bathroom I fainted. I felt chest tightness, palpitations and breathing became effortive. I felt this kind of episodes two more times. Because of palpitations doctor gave me anxiolytics, after that I felt better. Now my Hb is 10.8.then also I feel weak when I do physical work.Ecg showed tachycardia and chest X-ray and
thyroid function tests were normal. I admit that I have anxiety