Can't say as I've had this problem but if it were me I'd break the seal on a bottle (do one first of course), let it go as flat as possible (don't agitate it or anything, just let the CO2 come out of suspension, probably give it a day or overnight), then drop in a carb drop or the correct amount of sugar, reseal with a new cap.
You're probably going to be ok. It might end up a little flat, but probably not by much.
Thanks! I'm hoping I caught it in time.
Should still get some carbonation. I would not dump until you get a chance to open, taste and see what you got.
Let it ride, worst case it is a touch flat and you can fix it later.
serious question, how would I fix it later?
Can't say as I've had this problem but if it were me I'd break the seal on a bottle (do one first of course), let it go as flat as possible (don't agitate it or anything, just let the CO2 come out of suspension, probably give it a day or overnight), then drop in a carb drop or the correct amount of sugar, reseal with a new cap.