Hey, at least you have a clear, specific weakness to work on! That's a great thing to have.
Unfortunately, it's hard to improve CR quickly. Do you have the MPrep Foundations of Verbal book? That might be a good start, if you're very weak in CR.
Some of the issue is probably that you don't know how to answer (or even identify) the different CR question types. If you can consistently identify each question type, and if you know the basic rules for what makes an answer right/wrong, that would help. Hint: it's not really the same as 'real-world logic' - there are very specific, consistent rules that the GMAT follows when deciding whether an answer is right. And it doesn't always match up to what you'd naturally think of if you were just solving a problem you had in real life.
This resource will take you through the different problem types:
https://www.manhattanprep.com/gmat/blog ... reasoning/