I had episodes like this when I was younger. And had them flare up when I was taking Buspirone for anxiety as an adult. They'd last about 10-20 minutes and I always described them as "pure chaos of the internal geometric space."

Never did find any kind of label for the symptoms. I kept a journal of the episodes for a while. They seemed to come up monthly when I was around 16.

At the very least it's validating to encounter others who had had similar experiences.