My question involves criminal law for the state of: OR
So for months we have been planning a camping trip, and I am running around the grocery store grabbing all the food/mixers and other stuff we need for camping. I go to a self checkout and purchase over 140 bucks worth of stuff, even putting back some items so I could afford all the mixers in the top part of the cart. We have a rental car and the time is running out and I pay for everything (i think) and stroll off with my full cart, two girls at the checkout counter start to talk all secretively as I walk by, I am confused but too busy trying to get to the car. As I am loading in everything I see what I think is one of the check girls come down look at my car and walk off. I think nothing of it at first and drive home so we can get the rental back on time. I go over the reciepts and realize that I forgot to pay for some soft drinks that were in the cart. I try to get to the store before if closes but I was too late. I paid with my SO's card and the rental car was in her name. I don't want her to get in trouble for my mistake. And honestly I don't want to get into trouble either! I don't know what to do because I don't want to go into the store the day of my camping trip and get arrested! I plan on going to the store tomorrow and trying to get it figured out. any advice would be greatly appreciated.
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Also want to add that no one talked to me, I didn't beep or get stopped when I walked past the store security.

