Thanks for query.
you should consult gynae for urine test,blood test
and USG to rule out pregnancy
chances of pregnancy in your case is minimal because you have not ejaculated inside,but initial secretion also content sperm.she had EC pills also.but ovulation time is not confirm so chances of pregnancy always there.(no contraceptive
give 100% protection).
she had pills near her expected period so chances of delayed period is there,so don't worry period can be delayed for a month also.