My baby is four months and ebf, she poos 4-5 times a day, today she has had two very dark brown poos, is this something to be concerned about? She's teething atm - yesterday noticed that the first tooth has just come through the gum, she's chewing her fists loads and dribbling. Also, this morning she had a small amount of blood on her cot sheet on either side of her head and on her cheek, think this could be from her gums or possibly from my nipple, she's bitten me a couple of times and I have a wound on one nipple which has bled slightly, this was the side she had last fed from before the blood on the sheets. Could this be linked to the brown poo?