@GeeHO98 I found a website which talks about the inaccuracies of tests past 5 weeks and even had an experiment with diluted urine, just tried it and it worked, back to a dark line again! Which makes sense why yours are also darker in the afternoon. So relieved. No more pregnancy tests for me!!
Still going to book an early scan though, another 6 weeks to wait for a scan is far too long. Time seems to have slowed down since I found out I was pregnant.