You don't need to worry, Ellie. I had the same problem (residing in Germany). I had noticed yesterday that the earnings didn't update, and that the views/reads monitor showed zero, despite people actually reading my posts.

So, I sent Medium a request to clarify (you can go the help page and click through the help subjects. There you can find an option to send an inquiry). It didn't even take 8 hours for them to come back, informing me that this was glitch on their side, and that it has been resolved. By yesterday afternoon the statistics were up and running again.

I was impressed by Medium's swiftness of response and by their politeness.