Hello. Welcome to Healthcare Magic. A late or skipped period is always a little disconcerting. Aside from pregnancy, there are a number of issues that can disrupt a woman s menstrual cycle and trigger a late period, including severe stress, illness, excessive exercise, obesity, extremely low body weight, ovarian cysts, thyroid disease, or certain medications. In most cases, menstrual irregularities are transient, and the majority of women who have these difficulties have resumed their normal pattern within a cycle or two. If you had sexual intercourse during your last cycle, you should take a pregnancy test. If the test is positive, you have your answer. If the test is negative and you re not having any worrisome symptoms (pelvic pain, nausea, breast tenderness, unexplained weight gain or loss, severe headaches, etc.), it s reasonable to wait through this cycle to see if your period begins and you get back to your regular cycles. However, if you re having any other problems, it would be wise to see your gynecologist for an evaluation. I hope things are back to normal soon!