Hi OP
I really feel for you, I have no personal experience, however I do know someone who has had 6 - yes, really, six! C sections.
At the last one she was told, that it really was the very last one they could do, under no uncertain circumstances.
I don't want this to come across wrong, but at the end of the day, they have to cover their derrières against anything and everything that could go wrong and deliver worst case scenarios - much akin to google!
Perhaps, take a little step back and try to think how you would feel if the c section element wasn't there, as in, taking that out of the equation how do you feel able to manage a fourth bubba?
State the obvious, but seek a professional opinion too.
I know my friend really pushed it with her last two, but it WAS doable, and she was ok.