I had the depo injection 11 weeks ago. I wasn't told how long it lasted or what i needed to do when it does come to an end. I'm breastfeeding but woke up and went to the loo and there was a bit of blood. Now i wasn't expecting a period because of breastfeeding but this is the first time i've had the injection. Is it coming to an end and this is what happens? Or is it totally unrelated? I'm confused.