Ooooooooooooooooops! i meant to say last WEEK!
soorrryyy.
Sometimes women just skip a period for no reason, or are late. A number of things can cause you to skip such as certain antiobioditics, stress, poor diet. I would wait until you are due for your next one and then if you miss it, go to the Dr
your 15 so your periods arnt regular yet anyways
i started when i was 7 though