Not too sure on your background but.....I had prolonged bleeding after a d&c - I was still spotting after 2 months - and it turned out to be retained products, so hopefully that isnt what you have!
I got offered to try BCP to regulate my hormones again as I was either having long cycles or one every two weeks, but I decided against it and although my body did regulate to a long cycle (45 days) I still managed to conceive.
I personally went with accupunture which I kept up with until I was 15 weeks pregnant and past the "danger" zone, I honestly beleive that it did me the world of good even if it was just the thought that I was activly doing something to keep my baby "safe".
A natropath sounds like a good idea too.
I really hope that your journey improves soon, lots of baby dust to you