I am wondering, as matthios was, what medications you are on? If it is lorazepam or ANY other form of Benzodiazepines (xanax, valium, klonopin, ativan...) please read this!
My husband has complex PTSD. He was prescribed lorazepam and temazepam for it in 2010. If you don't know, studies on lorazepam have found that it is only to be used over a period of four months at the most. My husband was on it until November 5 of 2012. Towards the end of his period on lorazepam, the dosage he was taking was upped in response to tragedies happening in our lives. Almost immediately after his medication dose was upped, he started having the exact dissociation episodes you talk about. There would be a small trigger and a few minutes later he wouldn't know who I was, or think he was years back unable to control himself. Hours later or even the next day when he would come out of these episodes, he would have no recollection of what had just taken place. In a period of four months, he was admitted to the hospital on six separate occasions, as well as numerous police calls that did not end in a hospital stay and episodes that were dealt with as best as possible on our own. On October 31st, my husband had a dissociative episode after his childhood past was brought up. During the episode, he took the entire bottle of his Ativan which was filled that day and wrote a suicide note. We did not know he had done this or even that he had the Lorazepam on him but fortunately due to the nature of his dissociation the police were called in time to save his life.
He was admitted to the Mental wing in the Veterans hospital a day later. What we found out there has changed everything.
My mother-in-law and I went to talk to his doctor stating that we didn't want him to be released until he was going to be safe and things were going to get better. We also talked to him about the thought that my husband might have an addiction problem to the lorazepam. In an off-hand note, the doctor stated the lorazepam may be the cause of his episodes. We looked up information online and what we found was disturbing. A day later, the doctors took my husband off of lorazepam and after a week without, it was like a switch was flipped. My husband has not had a single dissociation episode in the entire month he has been off of the medication. Life as we knew it, has been able to start again. He still struggles with symptoms of PTSD but in his words, "Compared to what was happening before, the issues I struggle with now are at least bearable and I know I can overcome them instead of a heavy blanket that overwhelms everything."
This is a brief note as I am trying to summarize, but my husband was to the point of suicide on these medications and the medical studies behind the benzodiazepines support that it wasn't my husband going crazy or just his PTSD symptoms. Please read the article Benzodiazepines: What they do in the body by Professor C H Ashton, Institute of Neuroscience, Newcastle University in the UK. I cannot stress how important this information may be to you.