Confused about cm.

Sara

Do you only get egg white cm one day?? My <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> and other apps as well tell me my ovulation day is the 15, but I’m not having much cm at all right now. My cervix feels open and high and kinda soft but not completely. I got egg white cm on Monday the 11. Is it possible I ovulated then and now I’m just out of my cycle??