Pregnancy test line progression/ negative tests

[RadiatePositivity]

Hey I’d be very grateful to receive some other opinions on this. I have taken multiple first response pregnancy tests and have gotten positive on them all. Although I keep getting negatives on every other test. This has happened to me before where I have gotten positives on frer and negatives with other brands and have ended in no pregnancy. I know they aren’t indentation or evaporation lines as I’ve done extensive research on how to read pregnancy tests properly. In the past when I’ve gotten positive tests on frer, they either never got darker or they eventually got fainter. This time i’m having a hard time telling if they are getting darker so I’ll post a picture of the 3 tests I’ve taken this time around. The top 2 tests in the photo are days old so they are darker than they were originally. The one on the bottom is the one I took this morning which is almost as dark as the ones that have been sitting for days. Although I wouldn’t say it’s super dark comparatively. I’m wandering if you all would consider this as line progression?
I would be around 4-5 weeks if I am pregnant.

If you are getting negative on other tests then definitely see your GP for a blood test just to ensure you’re 100% pregnant. The last test does look the darkest x

That's strange they look like very clear positives and the bottom one does look darker, maybe the other tests aren't as sensitive? Try a clear blue digital ive always used these early and they've always shown positive when pregnant, I would also go to the GP they will be able to confirm

Thank you for your responses! I also think it’s very strange with how dark these lines are that I’m not getting a positive on the other tests that I’ve used. The other brand of tests I’ve used this cycle is the family wellness early result(from family dollar). Which says they are compared to the first response but I’m sure they probably aren’t as sensitive. Although I still expect a faint line with those since my line on the frer are pretty dark. I’ll definitely try a digital clear blue and then go to my GP to confirm. Thank you