Mine looked the same. I actually had that same type of line on two different tests. But AF came with a vengence this month. So I guess it was an evap line.
Someone told me that if it is colorless or gray it is probably an evap line, if it is pink then it is a positive. So I guess try again in a few days and see if the line gets some color on it.
Could be a faint positive or it could be an evap line. If you read it in the time limit though I doubt that it is an evap line. Like Heather said the best thing to do would be to go get a digital and take it in the morning or try to hold your pee for hours (like as if you were sleeping) and take it later today. Good luck I hope you get your BFP! :)
I had this same question when I found out I was pregnant. I thought I saw a negative then looked later and saw a very faint positive. Best advice given to me was to go out and buy a digital test, and test with your first morning urine. Pregnant or not pregnant... no mistaking that =)
Good luck hope you get your positive!!!