I took a pregnancy test and there was a very light second line what does that mean?

Pregnancy test. A faint line on the pregnancy test can mean either an early pregnancy (low levels of hormone) or it may be a false positive. Make sure you use an early morning sample and repeat the test in one week for confirmation. Alternatively you may see your physician and get a blood test done.
Pregnancy test. Depending on the test, that may have been an early positive test or you may have let the test sit too long. Best thing to do is repeat the test in 4-5 days if you haven't had your period. Use first morning urine. Follow the times on the test exactly. Reading positive or negative are only read at the time specific for your test brand.