I found out about this thread over at another thread. I have read some of the first and last message you posted but lately don't have the focus to take on this much detail. As the matter of fact I'm in my third trimester and took some dramamine this evening to help with my own insomnia:-)
I just want to weigh in my experience and hope there is something in it that you haven't tried.
I have a history of anxiety and depression. I was borderline suicidal for several years until I had a diagnosis for Hashimoto's Thyroiditis. Basically this is an increasingly common autoimmune disorder that affects women in our age group quite often. The flip side is Grave's Disease, and each has some common symptoms and each is vastly under-treated. After I got the help I needed with my thyroid (and no, I do not take natural thyroid nor do I think it's the first thing somebody ought to try to self diagnose), my life changed. I have not contemplated suicide since I stabilized on my medication in 2011.
Why did I go for years without a diagnosis? Because many doctors do not know that the standard TSH range that is considered normal has been lowered, and labs report back that a result is normal when in fact it isn't, and only a dillgent doctor will find the error/positive. I suffered for many years as a result, in a fog, thinking it was my bad childhood or bad attitude responsible for how tired I was feeling. I have seen others suffer with thyroid disorders for similar reasons. My TSH range was never way out of range, only slightly so, but the point is that it's common enough that I thought you should know my experience. If you suspect a problem with your thyroid or hormones, an endocrinologist is who you should see.
Anyways, what getting treatment for my thyroid did was uncover an anxiety disorder (mild but still mostly chronic GAD) I had been too depressed to recognize before. I still have fairly difficult sleep problems that got much worse PP, and assumed it must be adrenal fatigue, but it turned out not to be and after I was tested for this and had a discussion with a few different endocrinologists, I have accepted that I must manage my anxiety using the best medicines available. I had to see a psychiatrist, sadly. Ultimately it doesn't matter who I see or how I treat it as long as I do it aggressively. The problem is when you are in the midst of sleep deprivation, aggression is hard to come by.
(This medication searching process keeps getting stalled because I am either breastfeeding, pregnant, or taking care of other people's health instead of my own.)
Insomnia is a medical condition, and the bottom line is that there is no effective home remedy for chronic anxiety OR insomnia of this nature. I also have an extremely sensitive nervous system, which means that any slight change to my hormones takes me 3-5 times longer to adjust to than a normal person. Even though I only have mild GAD, it changes everything and I am too anxious to just start yoga/meditation like articles have told me to. I have to first start off with what works as strong and as fast as possible.
The toll this level of sleep deprivation has taken on my body has aged me very quickly in a few years and now my health needs to be a priority. If I encounter the same insomnia and anxiety problems PP that I did last pregnancy/pp, I am ready and guilt-free about accepting that I will not be breastfeeding, I WILL be taking drugs from a horrid shrink, and I WILL have to trust whatever my doctors say and go through the long arduous process of finding the meds that work through process of elimination. It's a long hellish process with a worthwhile reward at the end...because I get to live and watch my children live.
Insomnia is a very insidious problem that robs your body of its own ability to heal and is all it takes to open the door to several more severe diseases. It's like the gateway disease, basically.
I urge you to not give up your search for an answer and be ready surrender to a medicalized approach thoroughly and completely before you regret you didn't do it sooner. You have much more to gain than to lose from what I've read of your experience. I am very sorry if this sounds preachy or blatantly ignorant of where you are at right now; but I need to get some rest and wish you well in your road to recovery from this problem. I would hate to not share my experience not only for you but for others who will read this thread in similarly desperate situations.
So, the point I'm making is that I struggle with both hormonal and mental health issues that cause anxiety and insomnia, and odds are that one or both of these is the same problem for you. If that's so, your mental fog right now might trick you in to chasing a cycle of possible remedies instead of getting drastic and going the medicalized route, which might be worth a try.