Ovulation kit help. Why am I getting this reading?

Shannon

Hello! My husband and I have been trying to conceive since July of 2017. This month, as I have in the past, I started our clear blue advanced digital ovulation kit and got two low days in the beginning, then two high days and now I’m right back to low. We had sex Friday and again yesterday, so I’m hoping we made it? Why didn’t I get a peak or one or two more high days? I’m starting to get really discouraged 🙁