Hoping someone can make sense of my cycle this month. I'm usually bang on 28 days. I'm 5 days late and for the past two days have experienced very light, intermittent spotting...only visible on tissue, not enough to wear a pad. I've taken 3 pregnancy tests, all negative. I'm 36 so sure not menopausal. Don't feel more stressed than usual. Any ideas what is going on? Should I be concerned about the spotting?