I Am Taking 20 Mg Of Doxepin And 200 Mg

I am taking 20 mg of Doxepin and 200 mg of Neurontin but still experiencing terrible insomnia. I called my doc and expect to hear back from him tomorrow. In the meantime, I would like to take some Restoril I have left from several months ago, but don't know if it's OK to take it with the other 2. The Restoril I have is 15 mg. and I am thinking of taking just half of it.