my period is killing me

Hey ! But super in pain .... I've been on Junel fe 1/20 maybe like 3 going onto 4 this is my fourth period on the pill . The last 3 was great and ended on time this period has gone beyond the 5 day mark I'm on day 6 and probably from what I'm feeling from my body continue onto day 7. Now I know birth control can throw you left and right I'm just lost why it didn't happen the first three times . The second period was only 3 days and I loved that although my period seems to get worse ... Junel also helps with acne and i suffered with it badly but my face has been so clear since I started if I break out its one or two  pimples that I can pop and keep it moving , ladies I need some help please give opinions if you can thank you !