Could you possibly puke a week after taking the morning after pill?

Yes: Yes, but make sure you are not pregnant. Do a pregnancy test.

It's a possible side: effect. Potential side effects w emergency contraception include: menstrual flow changes (spotting, bleeding, early or late period), nausea, vomiting, dizziness, fatigue, headache, breast tenderness & abdominal pain or cramps. Take pregnancy test & notify dr if your period is 7 or > days late.