The video didn't seem to indicate an enormous panic, but when I watched it again, with the understanding that she was pregnant, it made me realise that she truly was trying to get away from someone. One of the news reports shows just a couple more seconds of the video and you can see that she's trying to hide behind the porch post, and is looking back to the street.
I can't imagine ringing a stranger's doorbell, hoping that someone answers quickly, but also dreading being caught dressed like that and perhaps exposed to further danger.