["I just don't know what to do. I was in such a rush. Should I go back?", 'No just go ahead and keep going.  It will be fine.', "Are you sure? What if they got me on camera and accuse me of stealing next time I go in? It's my regular store."]
If they would have had you on camera, they would have already come after you for it.  I wouldn't worry about it.
Oh my gosh, I got home from the store and realized I forgot to pay for my dog food!!