Flashing smiley no peak Clearblue.. can I still conceive?

Hi everyone we've been trying again after 2 mc earlier in the year and have started using clearblue digital ovulation kit. My cycles vary from 26-28days so I started testing day 14 of my cycle, I got a low reading until day 17 and then I got the flashing smiley. It's day 22 today so AF is due very soon and today still getting the flashing smiley?

I'm so confused I thought the normal luteal phase was 10 days, at this rate mines will be 4 or 5 :( is there any chance I've conceived this month? We tried every other day through the month religiously. Will really appreciate any info girls ❤️