Hi Angie530,
Thank you for using the Apple Support Communities!
It looks like you are wanting to know if the notification that you received to change your password was from Apple. I will be happy to help provide some information on this. If the notification was from an email, please review the section called, "How do I know if my Apple ID was compromised?"
If you think your Apple ID has been compromised
Here are a few articles that go over determining “phishing” emails and emails that are from the iTunes Store:
Identifying fraudulent "phishing" email
Identifying legitimate emails from the iTunes Store
Cheers!