Personally I would ask to be tapered off 95% of your meds and just start over , adding one at a time so you can monitor how your body reacts to the medications.

Often times when your body is being snowed under , your brain kicks into self preservation and produces all the chemicals it needs to keep you awake and anxiety ridden opposed to calm and sleepy.

I have had Chronic Insomnia since I was 12, So I know it sucks.

Just a thought.