Hi, I am working as software professional and my age is 26, weight 63.5, height 173 cm, my problem is last couple of days I was feeling drowsy and could not able to work in office feeling sleepy and like loss of glucose but when checked blood pressure is 60/110 and temperature is 98.9, I do not know what to do and still the condition exist, please tell me what is this symptom related to. Note: Before this condition one week before I have donated my blood and still feeling pain in my nerves.