Help. So confused and need opinions.

Erica • 🌈 👶🏼 #1 due 5/2020

I’m new to the strips I usually use the cb digital. I got a solid smiley on Sunday morning and then got the following strip tests. It looked like Sunday evening i got my positive on the strips but now today my opk looks like the darkest yet. Was today my surge or did my surge start Sunday? (Sorry for duplicate pics of today’s test)