Faint or evaporation line??

I took this at about 4 am (couldn't hold it anymore). Anyway, I thought I saw a faint faint line but i figured I was seeing things so I got frustrated and went back to bed for a little bit. Got up and saw this about 2 hours later... I plan to retest after work today. And probably in the morning. I'm a day late for AF... What do you think??