Hey y'all!

I just recently finished an irregular period after forgetting to take a few birth control pills while camping. I thought I was done bleeding but now what is coming out is brown liquid that looks like old period blood and is not very colorful. It does not have a bad smell. Smells like normal discharge and period blood. I have one more week of pills before my new period is supposed to begin on Sunday. When will it end? Why did it begin? Am I okay?