Not sure if I have line eyes or if there is a line

Amelia

So I took a frer pregnancy test yesterday and saw the faintest line and can still see one today. I took two more yesterday afternoon one clear blue early testing and it was negative and another frer and it was negative. This morning I took a frer fmu and I swear I see a faint line again but I’m not sure or if it’s an indent line. Also why would I have negatives yesterday afternoon and a faint positive again this morning?