Ovulation... ??

Was curious of if there are any ovulation symptoms to look for other than CM. I was egg white yesterday, today a bit more dry. But just a little bit of slight nausea & little twinges like cramps today & yesterday. BD fri and yesterday. But my opk were negative. Premom app says ovulation day is tmrw, my Glo app say Tuesday... jw. Newbie ttc 🤓