My girlfriend and I had sex (unprotected and very stupid) for the 1st time, I think it was the 2nd weekend of November. She got her period as normal a week after that (she's on the pill so it's regulated). After that we've been using protection since, until last week 11 December 10, a day or 2 after period ended, I messed up. The same day within an hour we rushed to get the morning after pill and she took it asap. She is still feeling sick 3-4 days after taking it. What does that mean?