I'm 25. My husband and I have been ttc for 7 months. This is the first time this has happened. I have kids so pregnancy and other changes like that I am uSed to. But this is a new change. I am having brownish discharge it's very very light. My ovulation is usually around the 15-16th. I have felt very nauseated, sleepy, sore in my back, and tender breasts. Could this be implantation bleeding?