I've had a similar experience when fasting. It also helped to realise that the "hunger" feeling in my stomach is just my body increasing its acidity in preparat

I've had a similar experience when fasting. It also helped to realise that the "hunger" feeling in my stomach is just my body increasing its acidity in preparation for food at its _expected_ meal time. It goes away after a few hours, especially with less carbs in your diet (as you say, bulking on carbs leads to really bad hunger pangs the next day that are hard to ignore).