Lines not getting darker?

Aine • Married May 2014. Expecting our Baby Girl on 29/06/2015

Hi ladies.

I had a miscarriage on 14th september, and ive managed to get pregnant before my next AF so I cant confirm dpo too well.

I tested on Tuesday and i was 8-10 dpo. I got a very very faint line.

I tested on Wednesday and got a faint line again, so i did a cbd and it said 'pregnant 1-2'

The only problem i have is that i tested again this morning, and its still very very faint.

I may be worried about nothing, but last time my tests werent getting darker and i found out my baby had stopped growing at 4weeks so my hcg levels werent rising.

Any success stories from faint lines that didnt get darker?