So my period is now late two days I took a first response not that long ago with FMU & I think I can see a line but idk shouldn't the line be darker if I am pregnant? My periods are always on track there never late. Why am I still getting negatives and really really faint lines if I haven't got my period yet..??? Help (Also I took a clear blue digital and it had the little book on it that means it didn't work rite)