Normal test lines?

I found on Thursday that I was 4 weeks, 3 days pregnant. I took 4 tests that day and they all came back definitively positive even though my urine was diluted. I took another one today, because I’m I worry wart, and it came back super positive. I’m just wondering if it’s normal for my test lines to be this dark at this point. Twins run in my family, my grandma and sister had fraternal twins... so I’m wondering if this could be a sign I will too. Thanks for any insight.

Tests from 11/2:

Test from 11/5: