I would temp over using OPKs, and have sex daily or every second day until you've had 3 days of elevated temps.
OPKs are a sign ovulation is going to happen but not a sign it has. EWCM is the same- it's caused by high oestrogen which is the prevalent hormone in the follicular phase. So - you may get Ewcm, or a positive OPK, but it doesn't guarantee ovulation will happen...your body might gear up to it, and not get there.
the only way to know if you've ovulated is by observing a thermal shift in bbt, or having a progesterone blood test to see if your prog levels are high enough to indicate ovulation.