PLEASE HELP. tests not getting any darker. help 😞

I found out I was pregnant a week ago and had some very faint lines. 
I have told my immediate family so I did a couple of tests to give to them. 
They are not any stronger from when I did my first last week. 
I did a clear blue blue dye and that was strong but all of them since have been just as faint/some fainter. 
Should I be worried? Is my hcg decreasing. Am I loosing the baby 😞