What? "Apple ID and phone number now being used for iMessage on a new iPhone."

Got this. Am I hacked? My daughter got a new phone on my account, but her Apple ID and phone number are not the same as mine. AFAIK, I did not recently sign in.

Do you know who “Susan” is?

For safety you may want to change your password. 

I phone can be synced with another on the same account. So your daughter can see everything you do on your iPhone.