Miscarriage now positive test

eli

I had a miscarriage on the 13th of November I had a scan on the 24th of November that showed a complete miscarriage nothing in the womb. Yesterday I took a pregnancy test that says 2-3 weeks pregnant. Do I go by the date I started to bleed or the 24th of November it’s a bit confusing as that would make me 4-5 weeks???