I've started my period a week early and it started with spots of brown discharge. This has never happened before, my periods are almost always on time from when I write them down. I've been a week late before but I have never been early and started with brown discharge. Now it's heavier and dark blood not bright red like a normal period. I haven't experienced any cramps like a normal period, usually I can feel a period coming a couple of days before it starts, this time I felt nothing it just surprised me. Can anybody help me with what may be going on?