have you paused it? pausing your tamagotchi will slow down the growth progress. but if you haven't paused it, don't worry, it will age eventually. my tamagotchi's sometimes take more than a day to age even if i haven't paused.
She's right, there was nothing to worry about. There was no need to reset it. But don't feel bad, at least you know what it is in the future so you won't reset!