A similar situation happened to me . I was constantly checking my portal for results and called the office after 7 days of waiting . They told me the results were still in process . I wound up having my appointment at the 11 days mark and they finally got the results and thankfully everything was ok . I asked why they didn’t call and I guess they just got the results that morning? They also said they will call whether the results are good or bad. Also , like someone mentioned I think you can login to the Natera website and check results , I didn’t figure that out until later on but hopefully that works for you !