No, you are not crazy.

I'm presuming the Doc has ruled out physical causes for this and run tests to see if there is something else going on like epilepsy. It does not sound like PTSD but I don't know your full history. Stress and anxiety can do all sorts of things to you so it may be stress related. PTSD is often accompanied by flashbacks of past trauma but the hallucinations you are describing would be more related to psychosis and that can be brought on by stress and lack of sleep.