Nick, does your "w" key not work? Or should I say, does your "" key not ork?
Anyway, how did you ramp up on IF? Did you just jump straight into the 18-19 hour fast it looks like you were doing? If so, you might try starting with like 12 hours and extending it an hour every week to let your body adapt. I IF ~20 hours/day, probably 5 days per week, but I don't follow the Zone. I'm Paleo with a lower carb amount.