CM questions for newbie

I just recently started TTC and confused about CM. I read that egg white consistency means you're fertile. Does it happen before ovulation begins? I think I have it but not totally sure because if my timing is correct I'm on CD 11 which would be too soon for ovulation right?? This morning I didn't have any type of discharge but this evening after I worked out (about 2 hours later), when i used the bathroom i saw a long string of (clear-ish) CM hanging out of me! (Sorry tmi 😆) so Now I'm wondering if my exercise could have influenced my increase in discharge? Or am I ovulating early? Any opinions appreciated 🙂