help😱😱😱

So Sunday morning I took a digital pregnancy test and it said Pregnant 
And then I took a line test and it showed a line right off. ( just took this ) this pregnancy test if from Monday
Then this morning I took 2 digital pregnancy test now it's saying Not Pregnant like I don't know what to do because I took another pregnancy test and it shows a line! 
Today I started doing brown discharge this is normal right?  Tomorrow I'm going to the doctor to get a blood testÂ