Bad test maybe?

Alexandria • I am a 28 year old mother of two beautiful girls! Azlynn Claire was born in March of 2013 and Arizona Ruth was born February 2019
So I am 4 days late and having the same symptoms I had when preg with my daughter. I went to take a Clearblue test just now (I know, first mornings pee is best but still) and before I even took the test there was a faint Neg. line on the result window... The test came out with the same result (the line didn't get any darker) but do you think I may have gotten a bad test?