What if you have pdst would that contribute to the insomnia?

Assuming you mean: Post-traumatic stress disorder (ptsd) then yes, disruption of sleep is one of many signs of this disorder. Here is some more informaiton: http://www.Ptsd.Va.Gov/public/pages/sleep-and-ptsd.Asp.

PTSD symptoms: There are many symptoms that are often associated with ptsd, including hypervigalence, heightened startle response, flashbacks, difficulty concentrating, irritability, and difficulty falling or staying asleep.