I am having a rough time with the LSAT. I am taking it on Saturday, but will likely re-take the test in December. My GPA is about 3.8, held student government positions, worked part-time throughout undergrad, worked full-time during the summer months, first in my family to attend college, et cetera. Do I have any shot of getting into Berkeley with an LSAT score of 155?

Not unless you are a URM and even then it isn't likely

All signs point to "highly unlikely"

If you are struggling right now I recommend taking a break, recalibrating, and going full throttle in December.

What section of the LSAT are you struggling with? What books have you been using? How frequently are you studying and for how many hours?

I took a Kaplan course and improved five points. The instructor of the course recommended practicing by doing nothing but logical reasoning, logic games and reading comprehension questions from low intensity to high intensity -- Kaplan does one star through four stars, I think -- and then take the Kaplan proctored exams each Saturday. I don't have to pay anymore, but I will not be able to go to the classes because I have night class. However, I could view them online. I also have the Powerscore books that are called bibles, but I have never opened them.

As far as my troubles, logical reasoning, especially assumption. And logic games, but I know I need major practice on those.

Have you gotten your hands on the powerscore bibles (the one for logic games and the one for logical reasoning)? The one on logic games is especially good. I picked up 10 points on the LG section alone after reading it. And the LR version breaks LR problems down by question type and gives a great explanation of assumption problems.

If I were in your shoes, I would postpone the October test, order both of those books, and spend the next 3 months mastering the material.

Whatever you choose, good luck!