there is something coming out of me and it shouldn't be period blood

I got off my period less than two weeks ago, usually there's three weeks, sometimes more between them, but last night there was something on my underwear. it didn't really look like blood, it looked like a thick clot so since I was super tired I didn't think about it, and went to sleep. usually when I start my period, there's a lot of blood, now i only see anything if I wipe, it's super super light and my periods always start out thick. it looks more like blood now, but it's brown. and I don't really feel any period pain. I'm just super confused because I literally JUST got done. I take birth control, isn't that supposed to REGULATE it? I'm not even through the second week completely, no where near my brown pill week, so I feel like I shouldn't be getting my period. and it's always super heavy the first three days, there's only a little bit if I wipe. I'm really trying to think of any other alternative besides being on my period because tomorrow is the first time my boyfriend and I will have the house to ourselves and that would kind of ruin everything about our plans 😅 I want to tell him but I want to wait until later in the day to see if it's still happening