very confused ??

I wish you could see in person.. it’s so much harder to tell in a picture but i feel like CD10 is a little lighter than CD12/13 but why did CD15 get lighter ?? did i miss something ? i didn’t want to test multiple times a day yet cause i started testing super early this month. i was going to wait for it to get a little darker and then start testing multiple times a day but when i went to test today it’s a lot lighter than i was expecting. i usually have a 31-36 day cycle. someone explain.. i’m so confused.