Hi alphonsa,
I myself have not used Veritas but I spend a lot of time in these forums and I have come across this question many times in the past. From what I have read, it is perfectly fine to use and is just as accurate of a sim test as the other major GMAT Prep companies. In addition, please remember that your sim tests generally range + or - 30 points. As I was saying to someone yesterday, sometimes there is a score that cannot easily be explained and just happens to be off. That may be the case with this score. It could be due to stress or it even be due to which questions you got wrong. Do not let this get you down, rather, continue your studies for another week, and then take another simulation exam. After seeing which of the two scores this one is closer to, you will have a better idea as to where you are at. From there you can make the necessary changes to your study plans. If you have any other questions in regards to this in the future, please feel free to ask me.
Good luck with your studies!
-Evan