Can you ovulate without EWCM (has a positive OPK this morning but no EWCM)?

This is my first cycle doing FAM so I’m still learning and ordered the book Taking Charge of Your Fertility but it hasn’t arrived yet so I’m not sure on the answer to this.

I have been taking OPKs and today’s was definitely positive but I still have very very light sticky CM and have for 4 days. It’s so light it is almost dry honestly. Below is today’s test.

Could I not ovulate because no EWCM or does not every one get that every cycle?

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