Faint line 6 days in a row...

Chrystal

Hi, This is my first positive month and I'm really worried about the fact that my pos lines arent getting any darker. Sunday was first day after expected AF. I tested positive with a FRER (nice line) and Monday I tested with a cheapi and got a very faint line.. every morning since it has been equally faint on cheapies (no lighter or darker) and I am now worried .. anybody else experience this?