Pregnant after chemical!

I had a chemical pregnancy two months ago and it devastated me. I’d only known I was pregnant for a week but spent that whole week getting excited and imagining meeting our baby. Fast forward to Wednesday last week when I got the faintest line ever and today it’s definitely there!

I just have one question though, I used a digital to test last time, and it said 1-2 weeks pregnant. That’s when I first thought something might not have been right because going by my cycle I should have been almost 4 weeks. Should I be worried that this digital says the same thing this time? Or does it calculate based off when it thinks you actually conceived? Or is it just lying altogether and it doesn’t matter what number it gives as long as it says pregnant? Thanks in advance!