try psychosis. I have times when I wake up in the morning and couldn't honestly tell you if what happened at night had actually happened or was a dream. I also have times when I swear I have done something and actually haven't or have done something that I don't remember doing or saying. Good luck
Nah it's not delusions. It's more where you think of doing something and can't distinguish whether it was something you actually did or something you thought of.
Probably not what your looking for but the closest I could come...
A delusion is commonly defined as a fixed false belief and is used in everyday language to describe a belief that is either false, fanciful or derived from deception. In psychiatry, the definition is necessarily more precise and implies that the belief is pathological (the result of an illness or illness process). As a pathology it is distinct from a belief based on false or incomplete information or certain effects of perception which would more properly be termed an apperception or illusion.
Delusions typically occur in the context of neurological or mental illness, although they are not tied to any particular disease and have been found to occur in the context of many pathological states (both physical and mental). However, they are of particular diagnostic importance in psychotic disorders and particularly in schizophrenia, paraphrenia and mania in episodes of bipolar disorder.
I found a term called Hyperreality which was exactly what I'm describing but it's used in relation to philosophy and not mental illness.