One ounce one time isn't going to harm him. If you don't have already I would get one of these dispensers! https://amzn.to/41x1XIM Every night before bed I prefill bottles with water and pre load this guy then when bub is hungry I just pour in, mix, and warm and I know everything is measured out right now matter how tired I am!
I’d call the doc and ask to be safe. Then you know. And then let it go. Man this sleep deprivation is REAL.
I’d hate to admit but I’ve done this also he was fine after try not to stress if you notice he starts acting werid or anything I say take him to get checked out but my son was fine he was two weeks old when I did the same thing he’s 1 month now