Too much information, but--
I am 47 years old. Despite having polycystic ovarian syndrome and insulin resistance, and basically having messed up hormones my entire adult life, I have never missed a period, or been more than a day or two late. I sometimes have cycles as short as 26 days; normally it is 28. But I'm hot a lot. A few months ago I was tested to see if I were going into menopause, and everything came back normal. Then a little later I had a period that went for about two days, then stopped, then started back up after a couple of days. Then it went back to normal. Today is day 32 of my cycle, with no menstruation thus far, (and no, there is no chance that I am pregnant). My mood has mostly been okay, but I have had a couple of premenstrual mood issues come up of late, most notably the other day, when I was upset about something relatively minor way more than I should have been. So maybe the change is upon me. I don't know. But I hope it is relatively problem-free. And blissfully short, for my sake and for those close to me. :) Any advice out there from those who have gone before?
PS Update 7/14/14: 6 days--almost a week--late and counting. I am starting to freak out a bit.