Line Progression

So, I am a crazy lady and have been taking a test twice a day since last Sunday when I found out I was pregnant. I have the cheapies from amazon, so I dont feel too bad. I am obsessed with seeing the line get darker!!!! My last pregnancy I saw a different OB and they had me come in for just a consult as soon as I found out and an ultrasound between 5 and 6 weeks. This pregnancy I went with a different OB and they aren't going to see me till I am 7 weeks!

I'm going to lose my mind! While I am happy I am low risk enough to bot be seen early, I still feel like I am going to be POAS for 7 weeks.

How long does the line get dark and stay dark for before It fades, like what week? Anyone else crazy like me??????