Help!! Why isn't my period starting?

Well I have never been pregnant but my mom always tells me that your period sometimes fluctuates. I sometimes get nervous too about having my period but eventually I get. Once in a while my period will skip a month or it will come a few days late. If you were pregnant, your hormones are still probably raging and need time to get back to normal. Just give it some time but if you are very worried about it I would suggest consulting your doctor about it.