I am 28yrs old and my periods have always been 29 days apart to the day. Extremely regular, except with the exception of 6-8 weeks after my two children were born. Here's my problem, on the 28 and 29 of June me and my partner would start having sex and before he'd ejaculate he'd pull out. On the afternoon of July 11 I noticed extremely light pink mucusy stuff on my toilet paper this happened for the day and the next day it was brown. This really light spotting has been going on for almost 5 days now. At one point there was a couple pin point size black clots. I am just now getting my pms symptoms, cramping, extreme moodiness, fatigue, headaches, etc... I wouldn't worry except this has NEVER EVER happened before. I have never spooted between periods. No stress, no meds, no change in appetite. Anybody tell me why blood is coming out of me for no apparent reason?