Chick 911- One of Two chicks is still standing and she's freaking out

I just returned home to find that we didn't completely close the door to the room that our 2 chicks were in and while we were out our cat reeked havoc on our baby chicks! I'm beside myself right now. We only had 2 chicks and one is dead. The other is freaking out. The 2 chicks would get so loud when someone picked one up and not the other, and now the lonely one has been making a racket for 30 min. It's too late to go pick up a new room mate (which I was planning on getting two more chicks tomorrow)... I'm just wondering if my chick will be ok through the night? I already feel horrible and she is freaking out all by herself. I don't want her to overwork herself.... Anyone have advice????

 

Thank you, That is helpful!