I've always thought it was camelCase and PascalCase. Someone just told me it's CamelCase and humbleCamelCase. What's the story?!?!

Your first assumption is correct

I didn't know it was called PascalCase, thanks for that

I learned this as camelCase and UpperCamelCase

PascalCase and camelCase it is. So easy to remember too: Pascal is a name, thus, it starts with an uppercase P, so PascalCase. Camel however is not a name, it denotes some type of animal and that we don't write with an uppercase C, so camelCase it is.

Balamory, wouldn't you like to know