Hi. Congratulations on your BFP!! I got a late one before as well, at 17dpo. Mine never got dark like yours, it was faint.
I have a question, was your teeth discomfort in this 2ww normal for you? I had teeth sensitivity for a couple of days and I am just curious. I had it last month as well. I feel like I would have ended up pregnant last month if it wasn't for a 9 day LP.
I am due for AF tomorrow.
Thanks for your help!