faint lines 😳

well guys , I've had unprotected sex for two years now with my love but this time , my period was supposed to start yesterday (by the app) but I usually start before the app says . I thought I was going start start a couple days ago because I was having very light cramps and a weird dark brownish blood colored discharge (implantation bleeding??) when I wiped but not heavy at all . I took a test this morning, but I didn't have the instructions , so I could have peed on it too long or something , but it's not expired . This is what I got .. I'm going to buy more test later , but I wanted to know what you guys think or maybe even what could have messed up the test ..