BFP until AFTER 5-6 weeks?

I know some woman couldnt get a bfp up until they were about 6 weeks or even 8! Id like to hear stories so i can hold onto my hope lol. Im going on 4 days late. Completely missing af this month so far and getting BFN. My friend said she wouldnt test positive until she was 6weeks. Hoping its the case for me 😩🤞🏾