Mental health issues aren't as easy to pinpoint causation, unfortunately. If there's a genetic predisposition and knowing that your bipolar was prior to your first csection having had tubes in your ears, there stands a chance that's part of the bigger picture. My aunt had told the family that the anesthetic probably brought about my cousins genetic predisposition from her paternal side. My aunt and that side of my family does their/our research and we just talk about it, reducing stigma and general misunderstanding.

Granted it's unfortunate that you couldn't have the delivery that you'd envisioned. Perhaps it was a safety precaution that you were unaware of? Many doctors are skittish of vbac. The way I viewed my own csections, it gave me extra time in the hospital to rest and recover. By my third, I had ample privacy, downtime and my third required skin to skin contact as he was losing body temp. We watched(sort of) a playoff game together, our team won. I found my first time in more upsetting of an experience, the breastfeeding judgy advocacy, the nurses not very helpful, they treat first timers like hmphh, found too much preachiness. That I didn't experience the following two times, not that they weren't all sweating my lack of moving my legs after the second, too much anesthetic. There's a whirlwind of things that occur in delivery that can compound depression, etc...