White line on Pregnancy test...HELP! don't know what to think!?

I have PCOS and it's my menstruation is past due. I had clomid last month but the follicles got bigger but it's not enough. I bought a pregnancy test and used it this morning. At first, it's negative but after some time it turned out like this...help pls....How am I going to interpret this? http://www.flickr.com/photos/35942330@N02/5678957056/in/photostream