Severe Period Pain and Mood Drops: Is There a Connection?

Does this happen any other time, or only when you’ve gone too long without eating? And when it does happen, does eating make you feel better? Does it only happen while you’re on your period? You could be right that it’s something hormonal and/or connected to your period. I’m wondering if it’s a drop in blood sugar. More context needed lol

I suffer from long and painful periods, and on my last day I suffer from the things you described here. My pcp said the reason is losing blood and iron due to the long periods.