looking for input

Ka
For the last 9 days I've tested 
Day 1: I got low
Day 2-8: I got high fertility
Day 9: I got another high fertility this morning I purchased another box and tested again right before dinner and got a low 
I've never not had a peak. This is my first ttc month. Getting pregnant before has always happened relatively quickly I've always used opk and never not had my peak day. 
Has anyone experienced this? Could my monitor thing have been defective and I just missed my peak day? 
Please help feeling worried and a little helpless we've lost 2 pregnancies at 20 weeks and I was hoping to have good news on Father's Day :/ now kinda feeling like that's not gonna happen