Clear blue weeks estimator help!

Lindsay • Baby #4 on the way!
Hi! Just found out, suprisingly, that we are expecting baby number 4 in Feb! I'm concerned though. I have been taking the weeks estimators and tonight it showed 2-3 weeks past ovulation. I'm anxious though because according to my dates, I'm 5w6d so it should be showing 3+ by now. Anyone experience this?