EWCM?

Today is cycle day 16. I haven't ovulated yet (confirmed by ultrasound today) and this evening I had one blob of clear, stretchy cm. I know this might be an over share, but I've never had EWCM before really. Does this sound like the right kind? Also, does that mean O is coming? Dr told me to trigger Sunday, I'm wondering if that's too far out now? Follicles were 14 and 20mm today. Not sure if all this makes sense.