Pregnant?

So I may be but I'm not completely sure. I tested tonight and I only got one line and I checked back a little later (not sure if it was too long) and I got a faint second line. I read that this could be an evaporation line. This may be TMI.......evaporation lines apparently occur when the urine starts to dry on the stick. I did however, have it covered, but still it could be an evaporation line. I also did test about 4 days early, which isn't necessarily accurate. I wish I would have timed how long it was when I went back and discovered the possible evaporation line. I guess if it's more than 10 minutes then that's when the evaporation line is possible. My plan of action is to test again first thing in the morning, time how long I wait and then see if it happens again. I'll keep you posted!