I had a "planned" c-section for DS1 as he was breech at 41w+6. I was so scared that I panicked and I had to have a general anesthesic at the last minute. I missed his birth, I missed being the first one to hold him and then spent his first days in an agonizing blur of pain and painkillers. I believe that this situation contributed to developing PND. When I was pregnant with DS2 18 months later I finally faced my sense of failure with my first birthing experience.
Based on my own traumatic experience I always urge people to talk about it, get the help you need to process what happened, and find forgiveness for yourself. Don't bury it in the blur of your baby's first few weeks and months of life. Face what happened and how you felt about it. Be gentle and kind to yourself now, because you need to be ok for your beautiful new child.
Best of luck and big hugs! ☺