Doc called me

So my doctor for the baby called but I wasn’t able to answer since I was in the shower. I don’t have a appointment for another 3 weeks and my last appointment was just a week ago from today. Has anyone’s doctor ever called random? I only left a voicemail saying their name and to call back, but when I did they told me the office had closed and I’d have to call in the morning. Any idea of why they would be calling?? I am now freaking out 😭🤦🏻‍♀️