25 day cycle symptoms faint line.

I'm in a bit of a pickel my cycle ranges from a 23 day cycle to 25 day cycle. 1st day of period was OCT 10th ovulation was 20th TMI but sex on the 19th and 20th period due Nov 4th. Test shows a faint line when taking apart. However I can't find anything on when I should test since I have a period every 3 weeks.  This would be my second if I am. I was hoping y'all could give me insight. The picture is my test without taking it apart.