When you feel like you've written a lot without really saying anything the best thing to do
a: find new sources to replace the ones you used in the report
b: put your draft aside for a couple of days and then review your thesis and main points
c: start the draft over.
d: write a new thesis statement

When you feel like you've written a lot without really saying anything the best thing to do is B. put your draft aside for a couple of days and then review your thesis and main points.
If you aren't in a hurry to write, then this is definitely what you should do. This way, you will feel rejuvenated and perhaps come up with many new ideas that you will be able to implement into your writing. Thus, you won't repeat the same points all the time.