Why don't you call your OB and have them schedule a BETA so you can know for sure what your HCG is registering in at! That way you can also make sure that it is increasing/doubling every 48/72 hrs.
I agree a line is a line, but it is always nice to get it confirmed with a simple blood test!
That line is the line that shows up when you are pregnant. It goes by your HCG levels. So if it's faint you are newly pregnant or you drank a lot of water or went to the bathroom and don't have as much HCG in your urine. So congratulations on your pregnancy!!!!!
try a different brand test. but you should definitely go to a doctor asap!
A line is a line. Congratulations!!! If you have doubts you should get a digital so it can tell you the news in words =)