Ovulation question

Do I have to have egg white cm for me to ovulate? My SO and I have unprotected sex almost every day (we are TTC) and I haven't seen any egg white cm even though every <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation calculator</a> I've used says I should be ovulating and today is my best chance of ovulation