abnormal?

So, I'm starting my 4th week of pills tomorrow, my first week of inactive pills. I forgot  to take my pill on the 9th and 13th of this month. I doubled the days after like I'm supposed to. But, the day after I took double the first time, I've had relatively light bleeding, and it hasn't stopped. It's been either a black, dark red color or really light pinkish/orange color the whole time, and pretty clotty. It hasn't stopped yet at all it's just been the same exact flow for over a week now!!! Idk if I should be worried or not. But I've never had anything like it before.