ovulation?

Annalece

I'm a bit confused. I had ewcm like in the picture between March 30th and April 1st but glow says I ovulated April 3rd. I realize glow can be off and the best way to really know if you're ovulating is to take an opk but I didn't. So my question is, should I assume I ovulated on the 31st and change that in my glow settings or just leave everything alone and test for pregnancy on April 12th as originally planned? When I got pregnant in December I ovulated earlier than glow predicted.