Back surgery/back problems

I'm just wondering if anyone else is in a similar situation to mine. I've already had 2 children, both full term, natural births. I have scoliosis, when I was 13 I had surgery on it for it was very severe. So I have rods on my spine, but a couple months ago I recently found out I have damage to a disc in my back due to my rods. My chiropractor told me that having 2 kids already probably didn't help the damage and he told me that a 3rd baby probably would be painful but it was possible. So here I am, pregnant with my 3rd child. Hopefully the back pain won't be too much this time.