My boyfriend and I had unprotected sex on the 26th. Things didn't exactly go as planned. Glow says that it was the last day of my fertile window (I usually ovulate the day before my last day in the fertile window). Of course Glow could be off by a few days, but I haven't been doing my cervical checks this month, so I have no idea when or if I have even ovulated yet. I'm just worried and wondering how high my chances of pregnancy are. I'm 18.