How do I find all my devices?

If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

By the way, never share an Apple ID.

Help your child set up an iPhone, iPad, or iPod touch - Apple Support

If you are using an iOS device you can log onto the 'find my iPhone' app. This should be pre installed on your iOS devices.

Alternatively if using a pc or Mac you can use your internet browser to log onto iCloud and use 'find my iPhone' from there.