This scared me what happened??

Very scary my 2 daughters went to bed hours ago
I'm up late so i heard noise in the hallway
so basically the 14 year old just came in the sitting room then she asked me where her sister was
Basically my heart sunk and I ran to the room to find she is in bed sleeping!

While i was processing everything
let me tell you my heart was raising and i literally
panicked and the hall way seemed so long and it's only a few steps away and it came to mind that for a second that maybe my daughter left
In a moment of panick not remembering that she is a few steps away and that I'm sitting in the living room near the door
I even went a second time to check to see
if she is really there even knowing she was 🥺
I'm still shaken !
This never happened before and she certainly was not joking she seemed confused
I hugged her and told her she is safe and loved and her sister is in bed
She didn't seem to be aware what happened anf she was even looking confused
So I tugged her in and gave her a hug



What do you think happened???