Probably because your course has just started
If that is your mom's routine to get on your case, are you worried that there's something bothering her? I would, and I would ask her if she's okay :)
Good for you, and I mean that in a good way. But still, if I were you, I would ask her. This shows you are concerned for her.
Thank you for sharing, and I understand. Be well, and have a fantastic and prosperous day :)