I see. If you're going to stay up all night worrying, I would give her a quick call. I think checking in that she's OKAY is not a huge deal, so long as you leave it at that and don't pry. Note her tone and any background noises. Like, "Hey, was just turning in and noticed you weren't home. Just checking you're okay."
It's MUCH better than looking like you stayed up all night.
