here's a head scratcher....

So I found out I was pregnant on feb. 5th, and I downloaded a few apps to track the process and all of the ask me the first day of my last period. Which was Jan. 8th. Which would lead me to believe that I'm 8 weeks and some days along, right? Well I had my first ultrasound a couple days ago and she said that I'm only 6 weeks along. Can someone explain to me why?  😔