CM question.. Likely TMI but unsure and need advice!

Had little if any CM texture all day until 10 pm tonight when CM was suddenly very present, milky colored and sticky/stretchy. I could stretch it between my two fingers. OPK test was negative around 4 pm today (test was not faulty). I'm not "supposed" to enter my fertile window for about 5 more days.
​Could tonight's CM be a sign of ovulation despite its sudden appearance AND a neg OPK today? Only 2 months TTC and totally new at this. Help!