I'm on the cerazette mini pill, I have been for almost a month, had my period on the 16th of January for over a week then up till beginning- mid feb I had irregular bleeding (light) me and my boyfriend had sex nearly 3 weeks ago, like I said I'm on the pill and he used a condom and also pulled out before he got to finish, what's the chance that I'm pregnant and what's going on with the bleeding? Someone please answer?