Evaporation Line with Blue Dye?

Danyelle
Hi Ladies,
I've been browsing these boards for the past couple of weeks but was a little too shy to post. Then I got this, earlier this morning. 
 
In your experiences do you think this is an evaporation line? It showed up between 5-7 minutes. Regardless I will be retesting in a few days but was hoping to get some input with anyone who may have experienced this! Thank you all!