Curious questions

This is my third pregnancy

With my first two I don’t remember The question I’m about ask even tho it was only 2 and 3 years ago but I am curious now how many of you that I’ve already had an appointment where exactly as far as long as they say you were based off your period or were you earlier or further along?

According to mine I am six weeks but I feel like that’s not true I feel as if I am earlier than that because ,one my pregnancy test are faint except for the one that actually says pregnant obviously and two they’re saying that I am six weeks and if that’s the case then the first week would’ve been on the first day of my last period So that all don’t makes sense to me well I don’t understand that concept so if somebody could explain it to me or tell me their experience they have already Went to the doctor I’d appreciate it

Pic of first test 7 days late

Pic of 8 days late

Pic of 9 days late