Lines on pregnancy test.

So last month I tested on the 1st day of my missed AF and we got a VERY faint positive. Sadly 3 days later my AF came and when I retook the test it was negative.

Is there any correlation of darkness of the positive line to how pregnant you are?

ThIs time I have been testing since 10dpo with positive results everytime.Today is the first day of my missed AF and I took a test and my positive line is much darker than the control line. As your hcg levels get higher in early pregnancy would that give a darker line? Is it almost safe to say i may not have a chemical miscarriage this month and this one might be the one? I will be going to see my doctor if I make it through this week with no AF, but last time I canceled my appointment since I ended up negative.

I'm nervous but I'm not stressing...little advice please?