What are the chances of pregnancy

I started the birth control pill 9 days ago, last Tuesday and now it is Thursday. I started taking the pill during my period. Today I had sex for the first time since I started my birth control, and of course the condom broke! I’m not sure if my boyfriend came in me, but maybe he did a little bit. I’m so nervous 😔 I was bleeding today which I’m guessing is spotting from the birth control… I’m very new to birth control and I’m still second guessing myself on the chances.