Dissociation
The derealization part can be symptomatic of many disorders, even viral conditions. You tend to loose memory of key situations and important events, having to be prompted by others whether they actually took place,whether important documents have arrived, filled in etc. The amount of times others have commented about me living in my own world,well...It's like getting stuck in childhood or adolescence, somekind of solipsism. Interpersonal relationships are a problem, getting the label of being unreliable or hypocritical and making sense of the 'real' world is a nightmare when confronted by benefits, activities of daily living etc.