I had a little Brown discharge for a couple of days and a little blood when I wiped a few days later. My period is nearly a week late but I've had a little cramping in my lower abdomen.
The brown discharge as it's blood that's simply sat up there a little longer than the red blood you're probably talking about. Brown blood can happen at any part of your period.
Do you have any other symptoms ?
The brown discharge counts as the first day as long as it's a regular occurrence.