Okay, so you did take the regular course with a live instructor? If so, did you sign up for the end-of-course test review? If you took the three practice tests listed on the syllabus, you're eligible for a review of your tests and advice from your instructor about what to do to continue to improve. This is the best advice to get right now, because your instructor already knows about your strengths and weaknesses from class, and s/he can also access and review your specific test results.
If you don't have your instructor's email address, you can email or call the office to ask (800.576.GMAT or
studentservices@manhattangmat.com).
If you only took 2 tests, not 3, email your instructor right away and ask whether it is still possible to get the test review if you take your 3rd test very soon, or to get a review based on only 2 tests. (Officially, you're supposed to have taken the tests according to the syllabus to be eligible for the test review... but if you ask
very nicely, then perhaps your instructor will make an exception for you. :)
I'm happy to help as well, but I would start with your instructor, because s/he will be able to give you much more specific advice than I can give you. If you have more questions after getting that advice, let me know, and we can discuss what to do.