Ahhhhhh WTF help

Okay I started birth control the sprintec one and it’s been 11 days of just straight bleeding and it was like normal period blood and then it got really clotted and almost black and it’s random so I’m bleed through so many pairs of pants and underwear why am I bleeding this much today is the 11th day... this isn’t normal mine are usually long but 11 days never in my life have I heard of an 11 day period