girl, I'm in the SAME boat! I'd been scoring consistently 160/161/162, and my last two PTS have been 155s, and I'm gonna crash out bc I take my test on Wednesday! Wishing you the best of luck <3

This exact thing happened to me in June. I ended up scoring 10 points lower than I'd been PTing, and it was super discouraging. That being said, I would also encourage you to keep your score. Law Schools are going to see a canceled score and assume it was a bad score anyway, so you might as well let them see some improvement! (I kept my terrible score as well)