Pine I hear you about pain coughing, sneezing or getting up too fast! Sometimes if I sneeze too hard, I apologize to the baby because I'm sure that wasn't fun for him either!
As for baby birth size - I obviously don't have personal experience, but my good friend gave birth to an 11lb baby last summer. She didn't have GD and she didn't have a c-section. Both she and her husband are on the taller side though and their 2nd child (this was their 3rd) was a big baby too. I mean, their 3rd is adorably chubby but I'm pretty sure he was wearing size 3mo at birth lol. Poor thing also gave birth on the later side too. I have no idea if she got an epidural but she didn't have a horror story to tell after the fact. Honestly that woman amazes me with how calm she always is.
As for birthing experiences - I'm learning it's best to be open. I once dreamed of having a home birth, or at least a birth at a midwifery birth center. I know now that will absolutely not be an option for me because of my unicornuate uterus and the high chance that my baby will be small and preterm. I am absolutely positive I don't want an epidural, but I am open to the idea of a c-section, especially if it's planned (I might have to have a c-section because once Baby reaches a certain size, he won't have room to turn around, so if it's nearing birth time and his head isn't down, I will not be allowed to have a natural birth). So, all that being said, I've had to come to terms with what will be will be. I hope for a natural birth, but I'm open to a c-section. Just no epidural. Absolutely no epidural lol. I'll do nitros oxide though.