Brown Blood- beginning of period

I've been googling on this and saw posts about brown blood the last few days of your circle but it was literally the day I was supposed to start- no help, so I thought the next thing would be to post anon on eve to see what it could be?

My period was supposed to be the 11th, that same day I did get A LITTLE bit of brown blood.. now it's the 15th and I filled half a panty LINER (not a pad) with brown/black blood but that's it.

I have a pic but not sure if that would help to get an answer so might not be necessary! If it is, please let me know :)

Any help please!?