Faint control line

Ariel

....I'm 5 weeks and my pregnancy test line is strong and dark as ever but the control line is faint ass hell.....what's that about?...I had a miscarriage when I was about mid way thru my 5th week, and lost it on the day of my expected period....and I know most doctors dont let you get an ultrasound until your about 8 weeks, so I plan to take a test every Sunday til I feel it move......