Hallow Dear, You should be informed that some secretions are ejected from the male penis before ejaculation. This is called as pre-ejaculatory secretions or Precum . Precum is expelled out unknowingly and the male is completely unaware of ejaculation of precum. Since he withdrew his penis just before he ejaculated his semen, it is most likely that he has deposited precum inside your vagina. Precum does contain some sperms. These sperms are capable of fertilizing an egg and cause pregnancy. You have mentioned the dates of your menses; however have not mentioned the date of your sexual exposure. It would have helped me to assess the risk of pregnancy. Now, I will give you the information by which you can assess the possibility of pregnancy yourself. Egg is released 14 days prior to the next menses. Egg is having 24 hours life while the sperms are active for 72 hours. Hence, a period of 8 days around the day of egg release is fertile window. If you had this venture during this period, you stand the risk for pregnancy. If you have not crossed 72 hours after the intercourse, it is best to take emergency contraceptive pill. If you miss your period, you may get pregnancy test done on the urine 8-10 days after missed period. Done earlier, these tests may give false negative results. Another very reliable option for you, though costly, is to get Beta hCG test performed. This test is very specific and hence highly sensitive and may give reliable results even few days prior to the missed period. If you are pregnant, you have option of Medical Termination of Pregnancy available. I am sure, this helps you. Dr. Nishikant Shrotri