Has anyone else had issues with the new low calorie sweeteners?

Last year I went through a phase of strange fatigue. I constantly felt sick. Like I was physically, not emotionally, depressed. But also slightly brain fogged. Eventually this cleared up and I assumed it had resolved itself for good so I did not investigate it further.

Half a year later and I felt the way again. I’d just gotten an order of magic spoon cereal (which is sweetened by allulose, a sugar-like molecule that has a fraction of the calories but tastes almost identical). I have a sweet tooth so I felt eating the cereal was something of a life hack. Infinite sweetness without any downsides!

I realized that before when I felt off I’d also gotten a delivery of magic spoon. I assumed the correlation was meaningful and stopped eating it and felt better.

Recently I’ve been drinking these stevia and monk fruit sweetened yogurt drinks. They seem to be making me feel the same way, so I guess I need to stop having those as well. It’s kind of a shame because I don’t think they even need to be so sweet - and I’d happily accept some added sugar or a sweet fruit puree mixed in.

Am I crazy or is this a common occurrence?