Is she going to be pregnant?

[Josh]

so 2 days ago i hooked up with my ex and i know that she is on the Depo-Provera birth control shot. When we dated and had sex we normally didnt use a condom and pulled out every time. I did pull out this time but for some reason and i didnt seem to notice but a large amount of blood started coming out. Im not sure if this is because i might have cut her when i fingered her or if it has something to do w/ ''spotting". She has been on the shot for 5 months now and i wonder if the blood increased the chance of her getting prego or if it completely canceled the BC