I was suppost to get my period today but I did not?

Ok I had slight cramps before school today, and unfortunately I don't have my period. I was suppose to come on today (according to my calendar on my iPhone) but last month when I got off my period it said 27 days starts your next period. Is that too early? I have had intercourse with my boyfriend 3 times last month on different days and we rely on the "pull out" method. No I'm not on birth control please help.

One day is completely fine. If it becomes a week late, then you should take a pregnancy test. DO NOT stress over it, because your body likes to trick you and make it even later and stress can make it later. DO NOT Google things, like symptoms of pregnancy, because then you'll start believing you are when you really may not be. Just relax, try not to think about it, do relaxing activities and just let your body do its thing.

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