when I gave birth to my third baby, I had attempted a vbac (first pgcy was with twins, failed induction, ended in c...). But once again, DS wouldn't come out. I had the chief o.b. perform the c, who is very midwife-friendly (he backs all the mw's at this practice.) During the c, as he was stitching me up, he asked if I was going to have any more children. I panicked thinking he was going to do a 'fix', so I said MAYBE! loudly so there would be no mistaking... but it was because he said my uterus was so thin, and that if i did become pg again, he I should have another c.
... well, just a mere 5 mos after that conversation, I became pg again, unbeknownst to me! I found out when I was 9.5 weeks pg. I went back to the same mw practice, which he is still the chief o.b, and they let me attempt a vba2c, and boy am I glad I did because this time it was successful! and I avoided pretty much every hospital protocol - ddn't even check in until after the fact! nothing in my veins... it was amazing.
I'm not sure if I would advocate always going against dr's orders, but I knew I didn't want surgery unless it was medically necessary, and fortunately, during my pregnancy and labor, things went well. From what I understand, a 9-month uterus with a babe inside is thin anyways.
I'd pay more attention to your health and your babe's health, and how you're feeling and progressing throughout your pregnancy and in labor. If you're concerned about anything at all, an internal monitor may help give you comfort knowing they can detect even the smallest blip before it becomes an emergency. Try not to look back. stay positive!