Did you try to access content from the US Store and didn’t notice you agreed to switch?
You might have lost your Apple Music now though. Once you switch countries it messes things up.
To get back to your region and sign out of the US:
Do this in the order it’s listed.
Next ...
- Launch Settings
- Tap on General.
- Tap on Language & Region near the bottom.
- Tap on Region
- Select your home region.
Next .....
in Settings- iTunes App Store - your name - sign in
Next .....
Open the music app
Tap on the For you Tab-
Tap on your profile in upper right corner
Scroll down to .view Apple ID - Sign iOut - Sign back in
I can provide further instructions on restoring your Apple Music, if you lost it, , but I’m not sure it will help