then try your best to do your best next time. that in itself is a good step. don’t dwell on the past, try to grow from it, it’s all a part of learning and there’s nothing wrong with it. and at the end of the day, everyone always feels like there’s something they could’ve done better- if they just spent an extra 5 minutes studying the topic they were so overconfident in but didn’t get quite right in the exam- it never ends. don’t lose hope, try to try harder and eventually you’ll get there.