I am 11 DPO and still having symptoms..

I’ve kept all my tests that I’ve done and these 2 have got the faintest pink line. Top one is from Wednesday last week and bottom is from last night. Both are afternoon/evening pee and the line is still there. The other morning tests I have taken have absolutely no second line.

I’ve known of 3 people to have thought their tests were negative to then see a faint line a few hours later.

Could it just be that my HCG levels are still quite low so the faint like showed up a bit later?