What Causes Hallucinations And Sleep Walking?

i just take naps whenever i feel i am about to collapse for some reason... and i sometimes get up and I m still dreaming. its like my body wants to wake up but my brain wants to sleep, but it lets the body do its thing. I am totally in my own world and its different than being alert and in the real world. its slower, and I m in my own head. I expect for everyone to know whats going on in my brain, and i talk to others while I m in this state. i come across as sleepwalking but i know i am doing it. i have had it lately and with hallucinations/sleepwalk. is there something wrong with my brain that causes this?