Is it possible to find out your pregnant 1 week after having sex. I just looked at my calendar and realized we had sex on the 5th without using protection. I tested today and the positive came up immediately. The other times we had were 30th, 3rd, and 9th but we used withdrawls method had to like give him a handjob for a good sec before he came so I really dont think it would have been any of those dates. the only other date there is is the 13th of last month but it was the start of my period so I couldnt have gotten pregnant then sense my period lasts 7 days. I'm just curious as to whether anyone else has ever gotten a positive that early