Confused with opk

Hey all!

I'm slightly confused by the ovulation predictor kit (using clear blue advanced) and the cheapies...

So been testing over a week got solid smiley on Monday. Then next day I took a cheapie and another test and had a negative. Is this what should happen? I didn't feel like I was ovulating, no pain and didn't notice EWCM. Yesterday though my cm was wet and slippery. Sorry tmi

We have dtd everyday except Sunday (day before peak) and now I'm so worried I would have missed it.

Any advice or experience would be greatly appreciated 🥰