Baby #1

Monika
So on Monday I found out I am pregnant through home pregnancy test. There was two lines. We've been trying for about a year now and it's the first positive pregnancy test. 
I'm so happy so I went to see doctor right away. But doctor told me she couldn't find my baby. She asked me to come again this weekend. 
Should I be worried? 
My last period was 19 June, and I think i ovulated around the 7th July - 10 July.