I had spd so bad with my first that I couldn't walk. It was agony!! After my VB it made it 100x worse and I was bed ridden for months!
Because of how bad it was and kept being 4 years later! I had a CS with my second.
So in your case I would absolutely go CS!! Please try not to feel guilty, how you choose to birth is not important, the baby at the end is along with your mental and physical helth
If you're happy with your SRC shorts get the CS ones and you will LOVE them! I still wear mine 2 years later for pelvic and back support. Good luck.