Hello girls! They are sending me for a second screening at 17 weeks. O…

Hello girls! They are sending me for a second screening at 17 weeks. On August 18 at the screening they told me this, and I, without thinking and without asking, left. Isn't that too early? I think I should call and clarify. Has anyone else been sent this early? Maybe it's because at 9 weeks I had a CT and an X-ray (of course with a lead apron), but the gynecologist is advising termination.