Cycle after birth control

I was supposed to start my Nuvaring on the 2nd. After some thought and research, my husband and I have decided to go natural. It occurred to me last night that Idk what my cycle is like without birth control. I have been on it (except for when I was pregnant 4 years ago) for 11 years. Could this affect what the app is showing me? I was 17 when I went on and my cycles were anything but normal back then. I'm a worrier in general. Nothing is pointing to being fertile right now but it has me curious...