I experienced that and my worst fears seem to come forward when it is dark. For me, it was helpful to research what the dark represents to the psyche and what it respresents spiritually, emotionally and mentally. That helped me to better understand what my subconscious was perhaps trying to symbolically say to me. I try not to run from my fears anymore. I've learned they catch up to me eventually and carry a lot more momentum when they do. I'm tired of getting rolled over.