Open Question: Fear at night when alone?

I'm 26 years old, far too old for me to have this fear, yet I can't seem to get rid of it. Whenever I'm alone at night, which is most nights considering I live alone, I experience intense fear that a stranger is going to come inside after me. Every noise in the house and any noise from outside renews those fears. I hate sitting in rooms at night where there's a window that isn't covered, since the reflections make it so that I can't see out, but I know there's a clear view inside. Unrelated to night time, I can't stand having my back to an entrance to a room. I have to sit so that I can see all points of access to the room or I'm uncomfortable. Now this isn't a baseless fear from a movie or scary stories. That's why I've not been able to shake it all these years. From the time I was 4 up to 13 I faced physical and sexual abuse from multiple individuals, one of them during the nights. I ran away from home at 13 after being forced into increasingly worse sexual acts over the course of several months by an authority figure (was made to return, but never told family why I ran away). So I grew up not really being able to trust the people around me, and that's part of this fear. The other part is when I was a small child my dad was out of town on a business trip and somebody tried to break in through the basement window. I was woken up by the glass being smashed in the middle of the night. They ran off when lights were turned on. Years later I was in the basement on the PC late at night, and I felt like someone was watching me. It was a very intense feeling. There was a window above my PC but I couldn't see out due to the reflection. It was such a strong feeling I had to leave. The next day I mentioned it, and my parents checked and found that some of the screws on the bars had been undone on that window. So someone had been watching me. I've had insomnia for years because of this fear, sometimes staying up the entire night because I just can't feel safe. As if I were to go asleep that's when someone would come. I've got a dog but it doesn't make it any better. I lock my bedroom door when I sleep, and recheck all the windows and doors of the house at night, sleep with a phone nearby as well as a weapon under my pillow. I still don't feel safe though, the fear is still there. Anyone who has experience with this, what can I do? Please don't say go talk to someone because I've done that and it doesn't help. I can't simply forget a third of my life.

Tagged as: Basement Window, Business Trip, Dad, Fear Movie, Fears, Insomnia, Intense Fear, Late Night, Night Time, Open Question, Parents, Reflection, Reflections, Scary Stories, Screws, Sexual Abuse, Sexual Acts, sleep, sleep disorders, Stranger, Strong Feeling