The cheapies aren't great for progression in the early days. If you're worried then get a couple of FRERs as they tend to give a much darker line with obvious progression (although bear in mind tests even in the same pack can differ in dye amounts, etc.)
Looks positive if it came up in the necessary time window. There was a fairly extensive thread a few weeks ago about whether or not they get darker and the consensus was no, that isn't what they measure, just pregnant or not. So try not to worry about that aspect of it. Good luck
It was my thread. Take a look a the pictures done with FRER, they stayed consistently the same colour over the period of a week. Also did a CB with weeks indicator which wasn’t very accurate either. I had bleeding too so as you can imagine, was a nervous wreck, especially after previous miscarriages.
Went for a scan at 7+1/2 and all was fine. I’m now 10 weeks and as far as I know, everything is progressing as normal.