Ectopic? Chemical?

I’m 16dpo. 2 days late and I got a vvvfl at 8dpo. Every day I tested up until 12 dpo and the lines got darker. I then tested at 14dpo and it was a lot darker. This morning I tested and it seems to be lighter than the 14 dpo. I had cramps all week and they weren’t really there yesterday. My boobs are on and off tender, but today seem super sore. Is this normal? Why would the line be lighter?

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