terrified in going to loose my baby...

A couple years ago I had a surgery to removed a collection of cells to be biopsied. 
It was all good. I already had a beautiful daughter 
I'm almost 20 weeks with my 2nd (daughter). 
From the surgery I have scar tissue all over my stomach. So the baby can't grow forward.
I'm already having trouble breathing, I don't have a bump and will never bc of it.
If the baby makes it she'll have to be born prematurely.
I'm just so upset that I might loose my daughter bc of all this scar tissue, I'm at a lost for words and so upset....😭
Advice? Help? Anyone going through the same?

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