Has anyone ever gotten pregnant 5 days before ovulation?

My husband and I use natural family planning because my body reacts horribly to birth control and I track ovulation and we avoid sex around that time and he usually never finishes in me. Well this past Monday we had sex and he ended up finishing in me because I’m not supposed to ovulate until the 15th (not for another week) and now 5 days later I am ovulating a week early (this happened when we got pregnant with my son too but we had sex closer to the early ovulation). Has anyone here had sex 5 days prior to ovulation and no more after and gotten pregnant? I’m freaking out a little bit because it’s rare I ovulate this early.