Well you're on 3 Atypical Anti-Psychotics, which are also known as tranquilizers, so no wonder you're going to bed early. I'm impressed you stay awake at all really, Risperidone kept me in a coma for 3 months, I had to build up a tolerance to the sedating effects and so I lived on energy drinks because sleeping at work is a nono

Med changes have been known to initially throw bipolar out of wack, but things usually settle down once our brains adjust to the new chemicals we're feeding it.