Is there an explanation of why I am so insatiable during the exam weeks (and a few days before)? Anyone else have the same problem?

I always baloon up during the exam weeks. The cravings for carbs and sweets are so bad, and no matter how much I eat, I'm never full. It's just like a few days before my period, but usually, when my period starts the cravings stop and my tummy will feel too uncomfortable for me to want to eat much. But during the exam weeks the cravings never stop, for.. like... 3-4 weeks. HELPPPPPP!!! I could eat 2 Pizzas in 1 day plus popcorn plus lots of chocolate and not feel sick! OMG!!! T-T
Is there an explanation of why I am so insatiable during the exam weeks (and a few days before)? Anyone else have the same problem?
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