So my gf and I are stressing and really nervous . I came in her several times like 2 weeks after she had gotten her last period . She last got her period last month on the 17 and hasn't got it this month should we be concerned ?

We also had gotten pregnancy test (blue line ones) she took one two days ago in the night and one yesterday morning . Both came out with a dark line and then with a faded line . But the line didn't fade until after about 5 minutes