Okay, I started prep 6 weeks ago and I have had a real hard time. I have had to wake up very early in the morning to be able to put in 4-5 hours for the GMAT. Trouble is, I am totally not used to studying so hard. So, I would get really, really tired for the rest of the entire day. I am in IBM and have to put in a full day's work.
I took care to sleep well, sleep early, eat energy foods.. but I am almost always dead tired because of my prep.
But just a few days ago I figured I needed to see a doctor for my fatigue. She diagnosed it as severe stress. So I am on medication for stress. It seems to be helping. I have been a little less tired the last few days.