HELP with birth control 😭 PLEASE

So I'm freaking out, back in January I took plan b, everything was fine but I decided to get the pill, I went and got it and took it as directed starting the first day of my next period, January 28th. It went well and was the usual 5-6 days. But a week later on February 12th it started again and it's been 11 days and is still going, in my pack two days ago I started the placebo pills and it's only gotten heavier since taking the placebo pills, I know it takes time to adjust but this is horrible and slight cramping everyday too, how do I make this stop and be normal? Also I'm taking lutera, a combination pill and haven't missed one.