... a pill. I have however been late by a couple hours taking a couple. Two Saturday's ago me and my boyfriend had sex without a condom and he didn't pull out very well. Last week I had some brown discharge just very light and I read that it was normal to have while on the pill. Now for about two days I've had heavier dark brown discharge, could this be implantion? I'm due to start my period in a week and I read that it occurs a week before. My period is still not on schedule that well so how can I tell if it is late or not?