If you take the time to practice, you should be able to increase your first score greatly. Take the time to read some of the fantastic stories on GMAT Club's boards about how fellow GMAT test takers increased their scores by a couple hundred points. I've learned a lot from reading them and by learning about what study strategies worked for them.
For free GMAT practice questions, follow us @econgmat_qs
Economist GMAT Tutor