Possibly dumb question.

I’m pretty regular, with 24 day cycles. I got my bfp yesterday at 11dpo. Another bfp today. Today I’m 3 weeks and 5 days according to glow. Well I’m watching those ‘what to expect’ videos on YouTube that start from 1 week - 40 weeks. The 3 week video says the baby is still traveling through the Fallopian tubes for implantation. I thought you can’t get a positive until after implantation? Can someone please explain this to me? I only track ovulation through two apps so yes, it’s always a ‘estimate’ but I generally always get my period same day they guess I would.