Ovulation question

Hello ladies. I'm on day 18 of a 31 day cycle. I'm trying to figure out when or if I ovulated and wondering if you guys can help. Hubby and I dtd on the 16th (CD 12) and my predicted ovulation is usually on CD 17 which was yesterday but I took an ovulation test yesterday that was kind of faint but looked almost positive if that makes sense? I didn't take a picture but I'm just wondering if that means I'm gonna ovulate a little later or if I already did. I've been having tender beasts for the past week or so on and off not sure if that accounts for anything. I don't typically track ovulation this closely but we're actively trying now so I'm hoping this will be the month for us. Thanks in advance.. any opinions are greatly appreciated 😊