The GMATPrep tests are the best indicators to your actual performance.
Additionally, I would recommend you to purchase the GMATPrep
Official bundle (Exam Packs 1 & 2, Question Pack 1). The questions
pack will give you access to more "official" questions, along with the
OG. Once you are familiar with the concepts, you should start
taking these tests.
Schedule your test as follows:
7 days from now - GMATPrep Free test2
15 days from test - GMATPrep EP1 Test 1
10 days from test - GMATPrep EP1 Test 2
6 days from test - GMATPrep EP2 Test 1
3 days from test - GMATPrep EP Test 2
After every test, analyze your performance and work on your
weak areas. All the best with your preparation!
Hope this helps you!