Hello and welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
First of all, I want to reassure you that
Plan B is extremely effective when taken within 72 hours of a condom accident or
unprotected intercourse. It reduces your risk of
pregnancy to less than 10%, and is maximally effective the sooner you take it after the incident.
Secondly, even though a small amount of sperm can be present in
pre-ejaculate, it typically only starts to leak out very close to the time of orgasm. So if your partner was not close to orgasm when he pulled out, the chances of being exposed to viable sperm is also extremely low.So in summary, in your particular scenario, your chances of pregnancy are extremely low. Nothing except abstinence is 100% effective, however in your case, I think you can be reassured that you will not conceive.
For some additional information, I just wanted to let you know the typically women have some vaginal bleeding or spotting between 3 to 7 days after taking Plan B. This is normal and is actually a sign that the pill is working. Your real menstrual cycle may be delayed if you have any bleeding from the Plan B.
I hope that I was able to adequately answer your question today, and that this information was reassuring. Let me know if I can assist you further.
Best wishes,
Dr. Brown