could I have missed the surge?

currently on CD 22. I have been testing since CD 10 and have had high readings since cd12. yesterday I felt like was the day. I have a ton of ewcm and my test lines were looking pretty good, I know you can't trust the lines on the digitals. anyways about 12hrs later I tested again and the test line was much lighter and this morning the same. i am just wondering if i could have missed the surge somehow or if i should just count myself out this month.

p.s. this is a femara month.