Since you asked, I do not consider taking oxy after surgery as going back to day one. Like Dee, I took it as directed for a specific purpose. After all, the doc carved bone off my spine and peeled nerves that had adhered to a blown disc. Without something strong I would have lost my mind. The truth is pills had never been a problem for me (though I admit a love affair with opium decades ago) until I got sober and started using old pain meds in my cabinet for anxiety. There is no doubt I appreciated being high when I was in so much pain recently. It reduced anxiety about everything that could go wrong after invasive surgery. But this is exactly why I wanted to wean as soon as I could stand it, and I'm grateful I had the presence of mind to keep on top of it.
I agree that you are overthinking it. Take care of yourself and try not to let the judgement of others mess with your head. You're on the right track.