I was charged today for something, don't know what

Then Apple didn’t charge you, if you don’t see the charge in https://reportaproblem.apple.com The charge was from someone else, or perhaps you got a scam message or email saying you were charged.

What was the result when you followed the guidance in the Related Article above your name on this page, that you were reading just before you posted here? If the Related Article doesn't answer your question please post back with more details about the issue and another user in this user-to-user forum will try to help.

Hello~ Where are you seeing this charge? On your device or banking/credit card?

~Katana-San~

Asking the same question over without reading the answer already posted won’t change the answer.