What's the longest you've waited for a bfp

With my previous 2 pregnancies I was 5 and 6 weeks before I got my bfp. I tested every day with my 2nd as soon as I missed AF I just knew. Yesterday I got a faint positive on a wondfo, but today all neg. I'm waiting a few more days to test again but I'm 4 weeks 2 days if I am.