My period is 9 days long

I missed a few birth control pills last month. It’s the first time I ever missed one.

I was on my placebo pills last week and started my period.

Im on my new pack and I’m on day 7. And I’m still on my period! My periods usually last only 4 days. But I’m on day 9 now !!!

I am very frustrated cause I want to stop bleeding.

Why is my period so long ? Is it because I missed a few pills last month ?? What can I do ??

Thank you.