I've never missed a birth control pill, my boyfriend wears a condom, and he pulls out. However, this month he stuck the head of his penis in for literally 10 seconds without a condom on, he didn't ***, and there was no precum on him. My period is in three days. Two days ago I started having tiny cramps and today I've had a small amount of brown discharge in my panty liner. Is this breakthrough bleeding or implantation? I'm really scared, please help me.