I relate to your frustration. After four PTs (168, 166, 168, 164) I hit a whopping 176 on the fifth, then dropped all the way to 160 on my sixth attempt this weekend. It was very disheartening getting a -6 and -8 on the two scored LR sections, and I felt like I was regressing.

I can't say I fully understand what happened, but it does seem like my problems have consistently been in the Conditional Reasoning questions, which I did particularly badly with this time around. Personally, I am going to follow Jillian062's advice and spend a lot of time with the specific questions I got wrong, including watching the explanation videos (which I've neglected to do thus far).

Best of luck to you!