Honestly, it took a long time for us, maybe two to three weeks. And then it took several weeks even after that to get used to preschool and not be nervous at drop off! But then, maybe three to four months in, the opposite opened— my kid runs in to see friends without saying goodbye and gets sad at pick up because they’re having too much fun!
I know it’s sad right now but it’s really normal and can last awhile! And then you’ll barely remember the days when it was hard.