Yes it isn't healthy for most people to be sleeping that much. It's good you are aware you have limited insight sometimes. My symptoms include starting to have grandiose thoughts of my own importance or to start thinking that other people are following me, or I am being watched, or I put tremendous energy into obscure undertakings, start to hear things, stop sleeping. Mostly I keep good track of my sleep and irritability and add olanzapine if I am starting to slip away. Once I get to a certain point I will not believe anythign is wrong with me and then it is only a matter of time until the people are at my door to take me away to a hospital again.