longer period days..

Jennifer • Angel baby in my heart 27/01/017 married 01/03 rainbow baby in way EDD 15/12/2018
I know after a mc your periods can go out of whack and thats fine. But last month i od on cycle day 18 and period lasted 11 days. Seven more than normal.
So now this month af is still here on cd five.... im meant to ovulate next weekendish.. ill test re opk
But can these longer period dates make it hard to conceive?
Or is it normal?
I dont feel like i have a tww... more like a week and half
Also if i have some mild bleeding would this mess up conceiving chances