My pdoc prescribed Prazosin for the PTSD and panic attacks/anxiety. It also helps with the nightmares and helps sleep in general. Its meant to be a blood pressure med but it has made a huge difference for me. I've done benzos and eventually got hooked on them and had a horrible detox when they started causing rebound panic attacks.

With sleep, it was recommended to me not to focus on the fact that you aren't sleeping. It stresses you out more. But to let your mind relax and go wherever it wants.