Due date & toddler issues

I’m due in a couple days and the last week my 2 year old has been acting out at school. He’s hit two other kids for what they said was for no reason. This is a new issue for us. He’s been at this school for about six months and we’ve had no issues like this. Things have started to change slightly at home. I’ve been trying to get things ready around the house for the new baby and he started going to school five days a week instead of three. Plus dad has started taking and picking him up from school. So idk if there could be a correlation between the new baby coming and his behavior? Has anyone else experienced this before?