Okay so basically I had sex on Saturday night then Sunday afternoon I had brown discharge which looked like old blood, I've now been bleeding since then and I'm wondering whether it's my period? It's not actually due until Next week though so I'm confused. It not normal looking period either, it's very light but I'd say it's heavier than normal spotting and it's brown. I'm on the progesterone only pill so I'm wondering whether that's had an effect? Any ideas would be appreciated !