Opk not showing surge

Julia

I have been taking opks the last couple days but either the app is reading it wrong or I am simply not having a surge. The bottom one is from this morning and the top is from feb 1 when I was at CD 12.

Should I keep testing or has the time passed?

1- taken at 3 pm CD 12

2- taken at 7 pm CD 12

3- taken at 7 am CD 13

4- taken at 2 pm CD 13

5- taken at 7 am CD 14