Your question is rather confusing. Does it mean that the pregnancy test done 1 week after the missed period is negative? Then in that case, pregnancy is unlikely, however, get one more pregnancy test and/or ultrasonography done for confirmation after one week. If luckily you have escaped the pregnancy, please in future try to follow more reliable methods of birth control. Withdrawal technique is one of the very unreliable method of birth control because: 1. Before actual ejaculation, there is pre-ejaculation secretion which does contain some sperms which are known to cause pregnancy. 2. One has to be mentally very strong and determined to withdraw the penis well in time which as per my experience with the patients for last 40 years is almost impossible all the times. Some times or other, the ejaculation does escape in the vagina which may cause pregnancy. So better switch over to reliable methods like condom, pills or intrauterine copper devices.