Hello
Thanks for writing to us with your health concern
I think that is is less likely that this is your withdrawal bleeding.
Withdrawal bleeding rarely occurs after 10 days, it occurs sooner.
It could be
implantation bleeding.
Also, it could be your period, because the
I pill can prepone or postpone your normal period by a week or more.
IT can also alter the amount and duration of menstrual flow.
Taking an I pill is always a dicey affair because of the associated menstrual irregularities.
To be sure that there is no
pregnancy, please take a pregnancy test 4 weeks after the episode of
unprotected intercourse.
In your case, chances of a pregnancy are minimal since there was no ejaculation inside, but pre cum also can make you pregnant.
Use a reliable method of birth control instead.
Take care.