So I took my first round of clomid (50 mg) and I am fairly sure I ovulated. The test came back with fairly similar lines but it was not crystal clear. However, the signs from my body suggested that I ovulated. So now my question is, when can I test? I know some tests are capable of giving results 6 days before your missed period. Can I do that, or will the clomid alter the results? I keep seeing the term "two week window" and I don't know what that means.