No. It is clear that she was bad for something else and not because she is pregnant. I doubt that she wants to get pregnant with someone with whom she sees little or nothing. Plus this month she had her period.
What is most regrettable is that she is alone. Maybe it turns out that she has nothing serious but it is bad to see her feel bad without anyone to give her a little comfort.
I definitely don't think she went out for dinner. I don't understand why to go back, take bags with food, go out again and come back. Unless she bought the food for someone else but it doesn't make sense.
In theory, if she left the light on, she should come back and not too late. It happened that she just didn't come back but I think it's pretty unlikely she won't be back tonight, this week.