So Confused!!! Doctor Appointment today!!

Ana

So I’ve been trying for the last 3 months to get pregnant going by my ovulating app!!! Surprisingly I got my BFP at 8-9dpo !!! According to my app I ovulated 1/11/2019 DTD 3 days before !! Wouldn’t I’ve conceived during or after 1/11 ?? Doc gave me my confirmation paper of being 4 wks and 4 days today saying I conceived 1/6 ???? Wouldn’t I be barley 2 weeks or so pregnant ?? Or am I totally wrong lol??!!!