Every diet or training scheme is not for everyone. Started grinding your teeth? If you just started, this may also point to a greater amount of stress lately. That is not a good time to be reducing carbs, especially if you only take them in on training days and you haven't been training.
Your dentist can make a custom night guard for you to prevent grinding your teeth at night. If you can't afford that, you can by them in stores but they won't fit anywhere near as well.