Had menstruation on july 2-5. How long does it take for implantation bleeding to occur if you possibly got pregnant on the 9th-10th of july?

Pregnancy. First off, it would be unusual to get pregnant on july, 9-10th if your period started july 2, provided you are on a 28 day cycle. Your ovulation would be july 15, 16. Most pregnancies (approximately 2/3) would not have implantation bleeding, so don't be just looking for it. If it were to occur it would around 10-14 days after conception right around the time of your expected period otherwise.