My DH and I are trying for bub #3, and although my period is late there is no positive pregnancy test yet. Because of our work schedules we last BD on 9 September, and I'm thinking there is no way I can be pregnant if I haven't gotten a positive test. My last two bubs had very strong positives a day after a missed period. Anyone had an experience where you had to wait more than 3 weeks for a positive test??