Could there still be a chance? Has unprotected 18th and 19th. I’ve never used ovulation strips or anything. Just this app. We tried last month every day during my ovulation and the day of, and nothing. A month before that we tried again all the time during and after ovulation and nothing. My periods are usually accurate, maybe a day off. Any thoughts? We tried later because we didn’t have time during this months ovulation and maybe something new needed to happen! Help