Yes. It's called an evaporation line. That's why you need to check the tests between 3 and 10 minutes. After 10 minutes disregard anything it says.
Read the instructions. any lines that show up after (normally 10 minutes) doesn't mean anything. It could be the line bleeding. Take another test tomorrow or the next day if you want, but don't rely on that one at all.
it is possible for the line to to show and still not be pregnant its called a false positive... or the test could have been defective... i wud wait and take another test in the morning using ur first moring urine