I need help! I've been ttc for about 3-4 months now. I track everything. I am 12 DPO, but yesterday I started bleeding heavy dark red/brown blood. I've never started my period this early before. I don't know if it's old blood or what's going on. I've also gotten Several faint lines on tests. My cycles are usually between 28-30 days. l'm nauseas, boobs are really sore, and i've had migraines along with backaches. Has this happened to anyone else ?