The emergency pill is 85% effective if taken between 25-48 hours after unprotected sex. There is a possibility of you getting pregnant especially after having a missed period.
You should have a home or blood test
and if positive please start taking Folic acid supplement
and visit your doctor to have an ultrasound to document a healthy intrauterine pregnancy and exclude ectopic pregnancy. If the test is negative you may wait for spontaneous menstruation
or visit your doctor to prescribe you progesterone
to induce menstruation.
I hope these words were useful and wish you good luck.
Dr. Ahmed Bahaa.