What's the pill doing to me

I was on the pill for a couple of weeks and it did the typical things; mood swings, small spotting here and there, and loss of appetite. I stopped taking it because me and my bf are trying for a baby now. And a week off of it I get my period but it lasts 8 DAYS! Then it stopped for 3 days and I woke up and had some spotting. Thought Mmm maybe it will go away in a day. But no it's been 3 days now and still bleeding and its heavier then just spotting. But it's like a dark brown blood what does this mean?? I'm so worried. I'll go check with a dr. When I get a chance.