Bleeding For 13 Days 😳

So , Im On Birth Control Pills To Stop My Period Because Of Other Health issues . I Take Mononessa Birth Control Pills , I Started taking them About a Month Ago. I Missed My Birth Control for 3 Days Straight , and I took 2 Pills The Day I remembered & I Took 2 The Next Day & Returned To the Normal Day By Day , My Period Started a Day or Two Before I Took The 2 Pills to catch up . I've Been Bleeding For Going On 15 Days Now . What Should I Do ?