When you say you are done with the OG, which edition do you mean? Shovan is right to mention the different editions and the Official Guide Verbal Review (either 1 or 2). Basically the Verbal Review questions are different from the Official Guide questions and if you go to a different version of the official guide you should get around 20 new questions. So that is one way to explore to get new questions.
If you need strategy as well as practice questions, then you will need a source for that. Shovan mentioned the Power Score Bible, other companies have strategy guides available as well and some of these guides will provide practice questions (so that will help) - for example, between the two Veritas Critical Reasoning Guides there are over 150 practice questions and none of these are repeated from the Official Guides.
https://www.amazon.com/Critical-Reasonin ... 1936240033
So strategy books can be another good source of questions. And these are written specifically for the GMAT, and yet designed to be more in-tune with the questions currently on the GMAT (as opposed to the questions in the official guides, which students often say are not diverse enough and might even lack some complexity. Remember questions in the official guides are very important, but they tell you what the GMAT was like a few years ago when these questions were on the test and not necessarily what the test will be like in a few weeks or months when you take it).
If you need still more questions an inexpensive source of quality questions is old LSAT tests. You will only want to use these after you have looked at the sources above because while LSAT questions are very well written not all of them translate to the GMAT. The following link is to a discussion of using LSAT critical reasoning questions to study for the GMAT:
https://www.beatthegmat.com/lsat-to-stud ... 69915.html.
So there are lots of options to choose from for questions. Good Luck!
