Ssandra - Thanks for sharing. There could be various reasons, but yes this could be the reason your sleeping patterns have changed. Many times we are not only integrating our life while we sleep, but we are also helping out others around the world. Especially right now when so much is going on around the world, our sleep might get disturbed at night (i.e. awake for a few hours), and we might sleep better during the day.
Not believing is not always enough to shut down our experience of something, especially if we have an agreement with someone prior to incarnating - but you can ask for a certain experience. If you want/don't want to have an experience (i.e. you don't want to experience the grandfather, you want to rest and not help out at night), simply ask for it. There have been numerous times where I've said "Look, I don't care what other agreements I've made, I simply need to rest tonight and not work". Not only did I get some great sleep, but a few times I've even been on a "spontaneous" vacation - swimming, snorkeling, beach time - it was fun and humorous to me that I would actually get a "sleeping" vacation!
Everyone - If you're having difficulties sleeping, doing some holotropic breathwork or conscious energy work before sleeping really helps (or if you're awake at night). Also any deeply intimate time with a beloved helps not just calm our nervous system, but also energetically replenishes us.