Have you had unprotected sex recently? I would get another pregnancy test - be sure you test first thing in the morning when you'll get a more accurate result.
I should get my cycle the 14th or 15th but tonight I got a very faint positive line on a pregnancy test. Am I pregnant?
After Danae's advice, you SHOULD GET SEX EDUCATED. Before you have any type of SEX. STOP having UNPROTECTED SEX.