Curious to know...

So I know you aren't supposed to read the test after the 3-5 minute window BUT, I thought I saw something super faint when I took these at the end of last week and over the weekend so I tossed them in the drawer (anyone else do that just to double check later? 🤷🏼‍♀️😂). Anyway, I just went and looked out of curiosity and 2 of them now have faint lines. Does this happen EVER with FR tests? It's never happened to me in the past so now I'm all anxious to go buy another test but wanting input until I get my booty to the store. What do you think?