My af was due 6/21 im late bfp ???

Brittany • Mother of 3 two daughters ages soon to be 8 and 4 and a son soon to be 6 hubby and i are ttc baby #4 to complete our family!!!!
My AF was due Sunday 6/21 it hasn't come yet I tested Saturday late afternoon I saw what I think was just an indent or evap bc it had no color. With my last childi had to wait 9 days after my missed AF before getting a faint positive..trying not to give up hope yet! Anyone else had to wait days after missing their AF before getting a bfp