LSAT Score

Hi Guys! I keep taking LSAT practice tests and my score remains the same - 140. I really want to take the LSAT in November as I am already registered, is 2 month enough time to raise my score to a 155? Does reviewing practice tests help a lot in increasing scores? I am getting the hang of logic games pretty well and reading comprehension I am not worried about. The logical reasoning section is really hard for me. Does anyone have any tips? I really want to start applying for law school but I feel like I will never reach my goal. HELP!