Mrrzy, the three foods you mention are sugary, so maybe it's sugar which is the culprit for your mood swings, more than just plain carbs. Orange juice, even if it has no added sugar, still has fruit sugars which are quickly absorbed.

Although, I remember that in one of your early posts you also mentioned the keto is considered beneficial for seizures, so two different health issues.

Anyway, your sugar hit might have been exaggerated because you have cut down on sugar and then you threw three sugary hits into your body in a relatively short period of time. It might be worth considering eating a piece of fruit for a slower, more balanced release of sugar into your system.