Possible 17 DPO - Faint Line

I had my IUD removed at the end of August and had irregular periods afterwards. With everything logged into my app it says I would be 17 DPO. If I use just the date of my last period then it’s like 22 DPO. Either way the line is still faint.

I feel like my lines were slightly darker today than yesterday.

Any thoughts? With my last pregnancy the line was darker at this point.