First period after baby

I am currently going on day 14 of this period and it is KILLING me! Okay so maybe not literally, but it sure feels like it. I'm on tri-linyah birth control tablet and this is also the first period I've had since having my daughter on October 28th this year. My pre-pregnancy periods lasted 3-6 days usually and I could always tell the day before my period ended because I would have a super light day. But so far I have yet to have a light day! There is no sign of this ending anytime soon :(