I have a fear of sleeping at night. Should I try fixing my sleep schedule or stick to what I do now?

Ok I haven’t told anyone this but for the past year and a half I have a fear of sleeping before 4am. I’ve seen couple posts saying our body is more vulnerable at 3 and 4am and even if I’m tired I will wait till about 5am to go to bed. I was in a toxic relationship and left very spur of moment and my whole world was turned upside down. I was consistently on the go and on edge just to try and relax and find the peace. Eventually I did but part of me wonders if deep down some trauma is causing me to have this fear. I know going to bed at 6am and waking up at 11:30 doesn’t help my body heal or process toxins. I just don’t know what to do