I took my first test Sunday (6/13/2021) at 13 DPP (days past peak) and the line was visible to the naked eye without squinting but my $1300 iPhone 12 Pro Max couldn’t get the line in the pic good (first pic on top of Proov packet). I took another test Monday (6/14/2021) at 14 DPP and it looked like an indent (no pic taken because I figured it was a chemical and I started spotting too). I spotted on and off Monday and it stopped Tuesday. Nothing else has transpired so I took another test today (16 DPP) and the line is darker and visible on camera (second pic on top of tissue). Should I be concerned that the line isn’t darker by now

This would be my 4th pregnancy and each of my other 3 resulted in healthy bouncing boys (2012, 2016, and 2019)