Implantation bleeding on aug31 took pregnacy test sep13 positivw took another test 2 days later.how far along am i and when did i concieve?

LMP ?: Fertilization, if successful, usually occurs about 2 weeks after the the last menstrual period. Implantation occurs usually 24-72 hrs after ovulation and fertilization. My best guess on date of conception is 1-3 days before Aug 31st as the lucky date. Using a gestational wheel and plugging in the right dates will give you the predicted due date as well, since you will want to know that also.