Need help please!

So I’m excited but cautious!

Here’s my background

7/18/2018 - started miscarriage

7/23/2018 - had D&C

8/15- 8/18 first period since D&C was lighter than before periods lasted a full 7 days

App says 9-9 I should have started period

I took a pregnancy test two days before negative.

Took a pregnancy test again like the 12th (I think) negative

Took one Saturday I didn’t wait the time frame because I figured “heck it’s not showing up within the first minute then it’s not going to” so I threw it away... later that night I don’t know why but I pulled the test out of the garbage and there’s two lines!

But I thought well I’ll need to wait until the next day and test again sure enough there’s a line but faint or not as dark as the control line.

So my question is, is this too early that I could be pregnant after the D&C or because of the light color do you think I ovulated late or could it be something else?

Any help would be greatly appreciated! I’m hoping I am and we have a sticky one!