Unprotected sex, but didn't pull out in time. starting day of ovulation. and took emergency contraception 76 hours later. side effect and vomiting 1wk?

Have to wait: Emergency contraception works best if taken within 72 hours. Vomiting is a common side-effect of the medication. She will have to wait to see if she gets her period. She should go to a doctor or clinic to get on a reliable method of birth control if she is going to continue to be sexually active. Finally, I urge her to insist that her partner wear a condom to help prevent STDs.