Is retaking the APUSH test worth it?

So I studied really hard for APUSH last year when I took the class and every time I took a practice test I got a 5. My teacher told me he was sure that I would get a 5, however, test time came and I completely forgot what the 14th amendment was, so I’m pretty sure I got a 0 on one of the essays. Hence, I only got a 3 on the test last year. Is it worth it to retake it this year?

Probably not, depending upon what else you have going on this year. Reviewing info from a year ago if you have AP tests this year is probably time better spent on something else.

Not really.
What’s more important is figure out why you freaked out and had a blank on something you knew then learn relaxation techniques so that doesn’t happen again.
If it still eats at you, sure, but it’s not the best use of your time.

You passed. You probably did well in your class. Don’t worry about it.