Period before I’m supposed to have it.

Emma

So I started the pill the 2nd and I’m supposed to start my period tomorrow but, I started last Wednesday and and still bleeding 11 days later. It’s a real light flow but still a pain. And for the first 4 days I had the worst cramps of my life and medicine didn’t help. Is this normal? And is there a chance I will stay on my period all next week when I’m supposed to have it?