[Christinaa317o8]

The pill takes 2 weeks to be effective, just so you know. I don't know if that was already said. plus, for the pill to be effective in reducing chances of pregnancy it must be taken at the same exact time every day with ( a half hour give or take) If she's on it for medical reasons it just has to be taken withing the same 2 hours every day.

And its too soon for her to have morning sickness, or any signs of a pregnancy, i think. One day off from a regular cycle is no big deal, plus if she's only had her period for a couple of years, being late or early by a few days is completely normal. Just wait it out, and get her a pregancy test if you really are worried. If you don't want her to get pregnant, then a) don't get in those risky situations b) just be a bit more careful and use protection
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There is a very slight chance that she may be pregnant, but still a chance. Don't stress too much!