I'm impressed with how proactive you've been and how insightful the comments in this thread have been. (Thank you to Lionheart777 for mentioning prazosin, btw.)
tiredmomma,
You're doing so many things right. You know that you need a new doctor, you're going to ask for a referral to a psychiatrist, you've tried sleep hygiene, and you know that dealing with your PTSD symptoms will help you to manage your insomnia. You mention that you feel more alert and energetic at night. That could be partially because of conditioning - as a personal example, I'm already a night owl. As a teen, I started going to bed later at night and waking up later in the day in order to asynchronize my schedule with my father's. You might be able to readjust your sleep schedule once you move out. It could also be that you're naturally (biologically) running on a different schedule and PTSD aggravates this. If you're more awake at night AND you're dealing with trauma symptoms, why wouldn't you want to avoid bed?
You'll want to rule out any other untreated conditions that could be contributing to the oversleeping/undersleeping pattern.
I think that eventually finding a way to subdue the vague horror will do wonders for your insomnia. All in due time once you move out, find a new doctor and a psychiatrist, and so forth.
In the short term, I find that melatonin and benzodiazepines help. Even if I'm thinking "But it's 11 PM and I'm finally awake! Why drug myself now?"
Um . . . it gets hazier after that. Sometimes before bed I write lists of things that have to be done. I keep a lined notebook by the bed. If I initially can't sleep because of anxiety provoking thoughts, I'll turn the light on and start writing.
Sleep hygiene is hit or miss, especially for those of us who have insomnia as a byproduct of an untreated psychological condition, or for the minority of people like me who have childhood-onset insomnia. I'll give myself half an hour to let my mind drift. Then I compartmentalize my real world problems and won't allow myself to go there. Only relaxing thoughts from here on out. If I'm still too awake, I'll try the writing, try some OTC supplements, and then return to bed. If my mind keeps wandering into bad areas, I'll eventually take a sleeping pill.
Could you try something new on an as-needed basis? I'm on a prescription drug called zopiclone. Hypnotic sedatives are . . . well, hypnotic. Zopiclone lets me latch onto one of those relaxing thoughts/images/mantras and drift off to it. I find that diphenhydramine, trazodone, etc. do make me drowsy, but it's not the hypnotic kind of drowsiness that actually puts me to sleep. YMMV.
I think this will slowly improve for you as you receive the treatment you need.
If anyone has any suggestions on how to get through to your doctor about PTSD symptom management, I am all ears! I'd love to hear unsuccessful attempts in addition to those that have worked. I always bring my symptoms/issues in written down and documented, as in frequency and such. I am going to a new doctor at the end of January.
Those last two lines? Well done. You're already handling this well.
Some doctors you just can't get through to. They have their own opinions about insomnia and PTSD... usually not very well-informed opinions. Until you can see a new doctor, I'd stick to the list of symptoms and try to get a feel for what your doctor is or isn't willing to do. Some doctors don't believe in c-PTSD; some doctors don't know how to treat insomnia beyond recommending sleep hygiene and drugging you; some doctors instantly go on the defensive when a patient seems to be more well-informed than the doctor is.
In my experience, until you find a health care professional who listens well and is willing to research if she doesn't fully understand a condition or a medication, it's better to work around the issue. Don't even mention your diagnosis. Mention the symptoms that you think he or she might be able to help you with. As you've already been doing, from the looks of it.