Has anyone had a chart like this?

I'm new to bbt as you can see from my chart but FF is saying my "temp seems to fluctuate more than usual". I've added my OPKs too, I've had a couple that looked like they were getting close to being positive, So close I started testing 3x a day but nothing yet. My apps predicted I was suppose to O over the weekend but I don't think so. Today is CD 19. Curious if anyone has had this happen to at all? Thank you for any input.