Heidi Tiger said what i was going to say. It's because of the flight or flight (sympathetic and parasympathetic nervous system[?]) which means your body will work more, maybe sleep less, pace, fidget. Also, your perception of what you're eating may have changed. As in, you may see it as been more than what it is in reality.
Is there anything you could maybe do to reduce the stress placed upon yourself?
Take Care,
Josh
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