7 positive pregnancy tests, but one negative digital?

As

I’ve been taking pregnancy tests up the wall for the last month, they all have been very faintly positive until I took a test two days ago and it is the strongest line I’ve gotten since I’ve been suspecting I was pregnant. So I decided to go out and get a clearblue digital test to have a cute way to tell my fiancé and family, but when I took it this morning it came up as not pregnant? I used my first morning urine, has anyone had this problem with digitals before? I’m just lost and confused. It doesn’t seem like my levels really go up drastically but I feel like the digital should’ve picked it up by now. Anyone know what could possibly be going on?

UPDATE: I ripped apart the digital and there’s totally two lines on this test strip!! So why would it tell me I’m not pregnant??