I called the cops on my friend when I thought she was in danger and then was angry at her after I found out she was okay.
Why did you get angry when you found out she's okay?
Yes, I'm angry at her because I don't understand why she didn't call me or email between the moment she got home from somewhere and the moment she was okay.
While you are right to worry and call the cops on her, I would not be angry to find out that she was okay. You shouldn't be angry with people knowing that they're okay just as long as you did your part in making sure they're safe.
I was really worried about her and thought she was in great danger. She could have let me know what was going on.
Yes, but it was still okay to call the cops. You did the right thing.