Negative or positive?

So I’m on birth control (the pill) but I took this test tonight as a joke and this faint line appeared.... I’m supposed to get my period in two days. I usually cramp for a few days before my period but I only cramped for a few hours the other day and I haven’t cramped since then. I’ve also been having watery discharge for about a week. I’m not sure what to think... has this happened to anyone else?