Maybe she's got cramps. Don't try to guess her mood by her facial expressions.
In her mind, you did something, real or imagined, that made her real angry, angry enough to kick you out. Now, she may be unable to handle her luggage, and maybe you didn't do anything atrocious, but to her, you're the bad guy and it's real to her. That's why she may be looking pissed. But like I said, we don't know. We don't want to know.
Wow, look at all the drama you would've been spared if you really did go NC.
Anyway, just be cool.