At this stage of the game, it's probably better not to plan on a specific test date. It's possible that you can get this done in 2 months, but you have far enough to go that it would be better to see how you're making progress as the next couple of months progress. Most people would need more than 2 months.
If you had significant enough timing problems on that first test, then it may not take you as long to get yourself to the level that you want. (In that case, you would have a higher level of knowledge already than your score showed.)
First, read these two articles:
https://www.manhattangmat.com/blog/inde ... lly-tests/http://www.manhattangmat.com/blog/index ... -the-gmat/Think about how you plan to incorporate all of that into your study.
Then, use the below to analyze your most recent MGMAT CATs (this should take you a minimum of 1 hour):
http://tinyurl.com/analyzeyourcatsBased on all of that, figure out your strengths and weaknesses as well as any ideas you have for what you think you should do. Then come back here and tell us; we'll tell you whether we agree and advise you further. (Note: do share an analysis with us, not just the raw data. Part of getting better is developing your ability to analyze your results - figure out what they mean and what you think you should do about them!)