I didn’t know what else to do so I called CPS on my daughter’s friend’s mother

The other day, my daughter was very upset, saying that her friend attempted suicide. We notified the school and they talked to the girl. The mom called me tonight going off about how her daughter would never say that and it really just made me sad to hear that she would not care and shut it down so quickly. She started cursing me out so I had to hang up the phone. shortly after that phone call, my daughter showed me a diary that the girl gave her. In the diary, she wrote that the mom told her to kill herself. So I called CPS because what else was I supposed to do?