Girlfriend deleted her snap stories?

My girlfriend went out with one of her guy and girl friends which I don't care about at all. She posted a snapchat photo of her and him together and made it her story, which is also cool. She then put up another snap story.

I didn't look at either of them and I went to bed at about 2 am and when I woke up to look at them the next morning they were gone.

Am I a straight up psycho for thinking this means something? She has been shady in the past.
Girlfriend deleted her snap stories?
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