Can't see anything on scan

Kelly
I'm not sure how far pregnant I am my last period was the 9th October and finished in the 12th when I had my coil removed then couple weeks later I felt pregnant took tests on the 9th November and all positive but today on the 20th November I went for a private scan which I should be 6 weeks pregnant and she couldn't see anything. Says I could just be early on I'm so worried. Had to have blood taken today for hormone levels and trait them next Monday see if the levels have doubled in 48 hours if high then should be okay. Me and my partner are so worried 😞