Hello and welcome, I am Dr Nilajkumar a consultant gynecologist and I will be helping you in your queries. Chances of pregnancy after ejaculation outside the vagina are zero. Also precum may cause pregnancy in a very rare instance when there has been a recent sexual contact and the person has not passed urine after that to flush sperms in the urethra and had a second sexual episode immediately. Even then, the chances of getting pregnant with these sperms is almost nil. It is mostly a theoretical possibility. So please do not worry. You may have a period in the next few days. If you miss it for more than 7 days get a urine pregnancy test done to rule out pregnancy. Stress also delays periods, so just relax, you are most probably not pregnant. Thanks for using HCM. Have a good day. Dr Nilajkumar Bagde Consultant Obstetrics and Gynecology