Stole a $4 toy from Target and I am truly freaking out

I was looking for littlest pet shops. There weren’t any packages left in the cardboard display case, all gone. The one toy that was left inside the display case that isn’t able to be sold because it’s legit inside the cardboard display case was there. I stole the toy from the cardboard prison it was trapped in. I am way too old for this, I don’t know why, I have never stolen anything in my life until now. I am freaking out. I know they saw me on the cameras. No one stopped me or anything but I’m so so scared. I know I shouldn’t call them back because it’ll make matters worse, especially since it wasn’t even an actual product able to be scanned to be sold so I am not even sure what I would say. I am freaking out about this ruining my life, I know super dramatic, but I genuinely don’t think I’ll be okay about this until I do something or I wait months to make sure it’s fine but that means being this anxious all the time for months on end. Help, do I say something? Do I let it go? I don’t know what to do.