Advice please

Hi everyone. I'm not sure how to put this i gave birth to my son 6 month's ago, and two months after I started to take the pill but it was the pill you take everyday. And I thought you had a , a week brake. Anyway I stopped taking the pill as I've been constantly bleeding on and off. I was feeling faint and low ect. They took it as I was anemic so they started me on irons and fluid acid.. anyway I stopped taking the pill and I'm still bleeding month's later they have put me on tablets to try and stop it which it haven't. I get sharp pains and feel sick. Just wondering if anyone had the same  symptoms as me and had it.