This happened to me just a few days ago. I am also taking the Sept lsat and scored a 159 on Friday. The last two PT's have been in the low 170's. For me, what was very different was my mindset. Last week, I was studying north of 6 hours a day and burning myself out. Perhaps, I thought that I could study away my anxiety (lol this is far from true). I truly believe that 50% of this test is mindset and the ability to stay calm during the test. I spent the weekend taking time off and then went through my wrong answers with a fine tooth comb. I'm planning on just doing two hours of high quality studying a day and reviewing. Idk if it will work for you but I'm gaslighting myself into being more confidence (affirmations really do help lol)