I, a lucid newbie, find that I get very delusional and odd at night (2am-3am) in the dark, particulary after i finish doing a tiring 6-8 hour flight online and everyone gone to bed. I know that delusion and other self inflicted mental events are caused by a uneven firing of a neurotransmitter in the brain. I don't do drugs or drink any form and shape of booze, I am highly against teenagers drinking, and won't even drink amongst my peers. Any reason for this? I've noticed lights flashing that appeared to be a ghost for a quick second, I know I probably arent dreaming because I bes all my way to the bathroom when I notices this

Any explanation to why i might be experiencing this?