2 weeks 4 days pregnant?!

Sienna

I went to the er on the 30th and found out I’m pregnant. My last period was aug 14. It’s due in 9 days but I tested positive on pee test & blood test. My levels were low obviously but I don’t understand how the hell im pregnant so fast and how the hell it showed up if I’m only 2 weeks and 4 days? I’m seriously so lost lol please help me understand 😂 I was “supposed” to ovulate according to this app on the 28th. But I found out 2 days later I’m pregnant? HELPPPP