Hi Tranatism,
I understand very much that what your going through is scarey, I've been where you are, I wish I had been capable (was a minor at the time) and had went and recieved helped at a hospital at the time, I suffered for months with hallucinations and pariond disllusionments, please get help, this isn't normal of PTSD, but stress from PTSD can trigger such things to happen.
They won't keep you forever, the people there are there to help you and won't do anything to hurt you. Please seek help hun. I wish you the best and keep us all updated.
I'm not sure what a VA inpatient unit is so I'm afraid I can't answer that question, I"m sorry.