A couple of things.
Childbirth can give rise to abnormal changes in hormones that can be treated with a proper diagnose of a hormone panel of tests and tracking thereof.
Secondly, c-Sections are accompanied by anesthesia treatment such as spinal epidurals. If an an overdose is administered, brain damage can result. I did not see your mentioning if a c-section was involved or not but this is just information.
In both cases and in other cases trauma to the brain can result in epileptic type seizure disorders displaying bipolar disorder or other convulsive disorders. At root is brain damage and brain disease.
Self-awareness is key to survival and to safety of others. Actress Catherine Zeta-Jones has done a lot for bring about public awareness. Public awareness is important because it destigmatizes the brain damage or disease and fosters research to improve treatments. Zeta-Jones is self-aware of her condition to the point where she feels an episode approaching and shuts her self in her room until it passes. This can sometimes be a few hours. Sometimes the medications are not always in balance and the medication field is still a research field.
Spirituality is important. Her turning to the Bible is important, very important but she must be aware that her perception of Biblical wisdom is quite different from when she is normal and when she is in the middle of an episode. If she can compartmentalize the two states, her faith derived from normal periods can help quell her actions during her episodes.
She did have an epidural during the birth but never had a C-section. She also went through menopause shortly after which doctors said was quite early.
Four months ago Dementia took her at age 62. The Dementia wasn't typical Dementia symptoms either. She knew who I and others were up till the day before she passed.
Some of her long term symptoms seemed Bipolar, some schizophrenic, some just psychosis falling in between. She wasn't always in the abnormal mental state there were periods of even a year or so where she seemed OK. Different medications were tried with never one that fully worked. This went on for 30 years with her husband passing three years before she did. Her doctors never reached a conclusive diagnoses but rather like most psychiatrist treated her behavioral symptoms minus trying to find the actual cause. A neurologist diagnosed her Dementia which was likely at that point correct but compounded by the other issues.
For your own physical and mental health you are going to have to get some reprieve care to give you a break for yourself for your own sanity. That is not being selfish that is a necessity for long term caregivers and it sounds like it's been quite a while since you've been there had that.. Long term caregiver which is what you have been. I've been there done that but my spouses medical issues were mainly physical ones.
I got some very wise advice 30 years ago from an elderly Nun in a hospital. My emotions had shut down because I'd been through some things very mentally traumatic. I had lost my first wife to a heart attack she was 23. Month laterby taking a job transfer I met someone else and while we were on a date she went quadriplegic almost dieing in the process. My brain said enough and for a brief period didn't allow me to feel any emotion whatsoever. It was a dark place to be. That's why you have to get reprieve. The Nun saw me and realized after a couple minutes what was happening. I wasn't allowing myself time for me. Oh and I married the girlfriend a few months afterward :>}
Second wife joined my sister less than a month later in death. You need a LCSW for yourself. A LCSW is a therapist. You have to take care of yourself to be able to take care of her or make a rational best for her and you decisions. A LCSW is a neutral and objective person helping you.
One last word of advice talk to a lawyer and get a medical Power of Attorney. In some states even national now I guess the rights and permissions of a spouse for consent or permission for treatment are not the same in circumstances of mental health. IOW you can sign for advance medical directives and make life and death decisions as a spouse but can not on your signature have her get mental health help. If she won't sign to be treated it is left up to the state to give permission not you.